diff --git a/apps/backend/apps/backend/src/api/auth/auth.controller.ts b/apps/backend/apps/backend/src/api/auth/auth.controller.ts
index dcfc0e8..38d4faf 100644
--- a/apps/backend/apps/backend/src/api/auth/auth.controller.ts
+++ b/apps/backend/apps/backend/src/api/auth/auth.controller.ts
@@ -10,10 +10,9 @@ import {
 } from '@nestjs/common';
 import { AuthService } from './auth.service';
 import { AuthGuard } from '@nestjs/passport';
-import { SignUpDto } from './dto/signup.dto';
-import { SignInDto } from './dto/signin.dto';
 import { Public } from 'libs/custom.decorator/custom.decorator';
 import RetrieveInfoFromRequest from 'libs/handlers/retriveInfoFromRequest.global';
+import { SignUpDto, SignInDto } from 'libs/types';
 
 @Controller('auth')
 export class AuthController {
diff --git a/apps/backend/apps/backend/src/api/auth/auth.service.ts b/apps/backend/apps/backend/src/api/auth/auth.service.ts
index 8d19848..8c76643 100644
--- a/apps/backend/apps/backend/src/api/auth/auth.service.ts
+++ b/apps/backend/apps/backend/src/api/auth/auth.service.ts
@@ -10,12 +10,11 @@ import { JwtService } from '@nestjs/jwt';
 import Redis from 'ioredis';
 import * as bcrypt from 'bcrypt';
 import { randomBytes } from 'crypto';
-import { SignUpDto } from './dto/signup.dto';
-import { SignInDto } from './dto/signin.dto';
 import sendEmail from 'libs/handlers/email.global';
 import handleErrors from 'libs/handlers/handleErrors.global';
 import RetrieveInfoFromRequest from 'libs/handlers/retriveInfoFromRequest.global';
 import { PrismaService } from 'libs/prisma/prisma.service';
+import { SignUpDto, SignInDto } from 'libs/types';
 
 @Injectable()
 export class AuthService {
diff --git a/apps/backend/apps/backend/src/api/user/book.controller.ts b/apps/backend/apps/backend/src/api/user/book.controller.ts
index 402bc5d..2825f89 100644
--- a/apps/backend/apps/backend/src/api/user/book.controller.ts
+++ b/apps/backend/apps/backend/src/api/user/book.controller.ts
@@ -11,10 +11,8 @@ import {
 } from '@nestjs/common';
 import { UserService } from './book.service';
 import { AuthGuard } from '@nestjs/passport';
-import { BookDto } from './dto/book.dto';
-import { SectionDto } from './dto/section.dto';
-import { NoteDto } from './dto/note.dto';
 import { Public } from 'libs/custom.decorator/custom.decorator';
+import { BookDto, SectionDto, NoteDto } from 'libs/types';
 
 @Controller('user')
 export class UserController {
diff --git a/apps/backend/apps/backend/src/api/user/book.service.ts b/apps/backend/apps/backend/src/api/user/book.service.ts
index c87970a..d665466 100644
--- a/apps/backend/apps/backend/src/api/user/book.service.ts
+++ b/apps/backend/apps/backend/src/api/user/book.service.ts
@@ -1,9 +1,7 @@
 import { Injectable } from '@nestjs/common';
-import { BookDto } from './dto/book.dto';
-import { SectionDto } from './dto/section.dto';
-import { NoteDto } from './dto/note.dto';
 import RetrieveInfoFromRequest from 'libs/handlers/retriveInfoFromRequest.global';
 import { PrismaService } from 'libs/prisma/prisma.service';
+import { BookDto, SectionDto, NoteDto } from 'libs/types';
 
 @Injectable()
 export class UserService {
@@ -90,17 +88,18 @@ export class UserService {
       throw new Error('Section not found');
     }
 
-    return await this.prisma.note.create({
-      data: {
-        // TODO save content
-        // content: note.content,
-        section: {
-          connect: {
-            id: sectionId,
-          },
-        },
-      },
-    });
+    // return await this.prisma.note.create({
+    //   data: {
+    //     // TODO save content
+    //     // content: note.content,
+    //     section: {
+    //       connect: {
+    //         id: sectionId,
+    //       },
+    //     },
+    //   },
+    // });
+    return 'TODO';
   }
 
   async getBooks(request: any) {
diff --git a/apps/backend/apps/backend/src/api/user/dto/note.dto.ts b/apps/backend/apps/backend/src/api/user/dto/note.dto.ts
deleted file mode 100644
index 10383b8..0000000
--- a/apps/backend/apps/backend/src/api/user/dto/note.dto.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { IsString, IsNotEmpty } from 'class-validator';
-
-export class NoteDto {
-  @IsString()
-  @IsNotEmpty()
-  content: string;
-}
diff --git a/apps/backend/apps/content_mgmt/src/content_mgmt.module.ts b/apps/backend/apps/content_mgmt/src/content_mgmt.module.ts
index 7f45151..3b420ef 100644
--- a/apps/backend/apps/content_mgmt/src/content_mgmt.module.ts
+++ b/apps/backend/apps/content_mgmt/src/content_mgmt.module.ts
@@ -1,10 +1,13 @@
 import { Module } from '@nestjs/common';
 import { ContentMgmtController } from './content_mgmt.controller';
 import { ContentMgmtService } from './content_mgmt.service';
+import { PrismaModule } from 'libs/prisma/prisma.module';
+import { EditorModule } from './editor/editor.module';
+import { EditorService } from './editor/editor.service';
 
 @Module({
-  imports: [],
-  controllers: [ContentMgmtController],
-  providers: [ContentMgmtService],
+  imports: [PrismaModule],
+  controllers: [ContentMgmtController, EditorModule],
+  providers: [ContentMgmtService, EditorService],
 })
 export class ContentMgmtModule {}
diff --git a/apps/backend/apps/content_mgmt/src/editor/editor.controller.ts b/apps/backend/apps/content_mgmt/src/editor/editor.controller.ts
new file mode 100644
index 0000000..e4d2133
--- /dev/null
+++ b/apps/backend/apps/content_mgmt/src/editor/editor.controller.ts
@@ -0,0 +1,70 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Body,
+  Param,
+  Patch,
+  Delete,
+} from '@nestjs/common';
+import { EditorService } from './editor.service';
+import {
+  CreateBlockDto,
+  CreateNoteDto,
+  UpdateBlockDto,
+  UpdateNoteDto,
+} from 'libs/types';
+
+@Controller('editor')
+export class EditorController {
+  constructor(private readonly editorService: EditorService) {}
+
+  // POST /api/documents - Create a new document
+  @Post('note/new')
+  createDocument(@Body() createDocumentDto: CreateNoteDto) {
+    return this.editorService.createDocument(createDocumentDto);
+  }
+
+  // GET /api/documents/:id - Retrieve a document
+  @Get('note/:id')
+  getDocument(@Param('id') id: string) {
+    return this.editorService.getDocument(id);
+  }
+
+  // PATCH /api/documents/:id - Update a document
+  @Patch('note/:id')
+  updateDocument(
+    @Param('id') id: string,
+    @Body() updateDocumentDto: UpdateNoteDto,
+  ) {
+    return this.editorService.updateDocument(id, updateDocumentDto);
+  }
+
+  // DELETE /api/documents/:id - Delete a document
+  @Delete('note/:id')
+  deleteDocument(@Param('id') id: string) {
+    return this.editorService.deleteDocument(id);
+  }
+
+  // POST /api/documents/:id/blocks - Add a new block to a document
+  @Post('note/:id/block/new')
+  addBlock(@Param('id') id: string, @Body() createBlockDto: CreateBlockDto) {
+    return this.editorService.addBlock(id, createBlockDto);
+  }
+
+  // PATCH /api/documents/:id/blocks/:blockId - Update a block
+  @Patch('note/:id/block/:blockId')
+  updateBlock(
+    @Param('id') id: string,
+    @Param('blockId') blockId: string,
+    @Body() updateBlockDto: UpdateBlockDto,
+  ) {
+    return this.editorService.updateBlock(id, blockId, updateBlockDto);
+  }
+
+  // DELETE /api/documents/:id/blocks/:blockId - Delete a block
+  @Delete('note/:id/block/:blockId')
+  deleteBlock(@Param('id') id: string, @Param('blockId') blockId: string) {
+    return this.editorService.deleteBlock(id, blockId);
+  }
+}
diff --git a/apps/backend/apps/content_mgmt/src/editor/editor.module.ts b/apps/backend/apps/content_mgmt/src/editor/editor.module.ts
new file mode 100644
index 0000000..381e49a
--- /dev/null
+++ b/apps/backend/apps/content_mgmt/src/editor/editor.module.ts
@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { EditorController } from './editor.controller';
+import { PrismaService } from 'libs/prisma/prisma.service';
+import { EditorService } from './editor.service';
+
+@Module({
+  controllers: [EditorController],
+  providers: [EditorService, PrismaService],
+})
+export class EditorModule {}
diff --git a/apps/backend/apps/content_mgmt/src/editor/editor.service.ts b/apps/backend/apps/content_mgmt/src/editor/editor.service.ts
new file mode 100644
index 0000000..19be563
--- /dev/null
+++ b/apps/backend/apps/content_mgmt/src/editor/editor.service.ts
@@ -0,0 +1,99 @@
+import { Injectable, NotFoundException } from '@nestjs/common';
+import { PrismaService } from 'libs/prisma/prisma.service';
+import {
+  CreateBlockDto,
+  CreateNoteDto,
+  UpdateBlockDto,
+  UpdateNoteDto,
+} from 'libs/types';
+
+@Injectable()
+export class EditorService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async createDocument(createDocumentDto: CreateNoteDto) {
+    return `TODO ${createDocumentDto}`;
+    // return this.prisma.note.create({
+    //   data: {
+    //     title: createDocumentDto.title,
+    //     blocks: {
+    //       create: createDocumentDto.blocks,
+    //     },
+    //   },
+    // });
+  }
+
+  async getDocument(id: string) {
+    const document = await this.prisma.note.findUnique({
+      where: { id },
+      include: { blocks: true },
+    });
+    if (!document) {
+      throw new NotFoundException(`Document with ID "${id}" not found`);
+    }
+    return document;
+  }
+
+  async updateDocument(id: string, DocumentDto: UpdateNoteDto) {
+    const document = await this.getDocument(id);
+    return `TODO ${document} ${DocumentDto}`;
+    // return this.prisma.note.update({
+    //   where: { id },
+    //   data: {
+    //     title: DocumentDto.title ?? document.title,
+    //     blocks: {
+    //       update: DocumentDto.blocks,
+    //     },
+    //   },
+    // });
+  }
+
+  async deleteDocument(id: string) {
+    const result = await this.prisma.note.delete({
+      where: { id },
+    });
+    if (!result) {
+      throw new NotFoundException(`Document with ID "${id}" not found`);
+    }
+  }
+
+  async addBlock(id: string, createBlockDto: CreateBlockDto) {
+    return `TODO ${id} ${createBlockDto}`;
+    // return this.prisma.block.create({
+    //   data: {
+    //     ...createBlockDto,
+    //     id: id,
+    //   },
+    // });
+  }
+
+  async updateBlock(
+    id: string,
+    blockId: string,
+    updateBlockDto: UpdateBlockDto,
+  ) {
+    const document = await this.getDocument(id);
+    const block = document.blocks.find((b) => b.id === blockId);
+    if (!block) {
+      throw new NotFoundException(
+        `Block with ID "${blockId}" not found in document "${id}"`,
+      );
+    }
+    // return this.prisma.block.update({
+    //   where: { id: blockId },
+    //   data: updateBlockDto,
+    // });
+    return `TODO ${updateBlockDto}`;
+  }
+
+  async deleteBlock(id: string, blockId: string) {
+    const document = await this.getDocument(id);
+    const block = document.blocks.find((b) => b.id === blockId);
+    if (!block) {
+      throw new NotFoundException(
+        `Block with ID "${blockId}" not found in document "${id}"`,
+      );
+    }
+    await this.prisma.block.delete({ where: { id: blockId } });
+  }
+}
diff --git a/apps/backend/apps/backend/src/api/auth/dto/signin.dto.ts b/apps/backend/libs/types/auth/login.user.dto.ts
similarity index 100%
rename from apps/backend/apps/backend/src/api/auth/dto/signin.dto.ts
rename to apps/backend/libs/types/auth/login.user.dto.ts
diff --git a/apps/backend/apps/backend/src/api/auth/dto/signup.dto.ts b/apps/backend/libs/types/auth/signup.user.dto.ts
similarity index 100%
rename from apps/backend/apps/backend/src/api/auth/dto/signup.dto.ts
rename to apps/backend/libs/types/auth/signup.user.dto.ts
diff --git a/apps/backend/libs/types/editor/block-type.enum.ts b/apps/backend/libs/types/editor/block-type.enum.ts
new file mode 100644
index 0000000..18c09f3
--- /dev/null
+++ b/apps/backend/libs/types/editor/block-type.enum.ts
@@ -0,0 +1,6 @@
+export enum BlockTypeEnum {
+  TEXT = 'TEXT',
+  IMAGE = 'IMAGE',
+  LINK = 'LINK',
+  INTERNAL_LINK = 'INTERNAL_LINK',
+}
diff --git a/apps/backend/libs/types/editor/block.dto.ts b/apps/backend/libs/types/editor/block.dto.ts
new file mode 100644
index 0000000..2eff7ac
--- /dev/null
+++ b/apps/backend/libs/types/editor/block.dto.ts
@@ -0,0 +1,26 @@
+import { IsDate, IsEnum, IsNotEmpty, IsString } from 'class-validator';
+import { BlockTypeEnum } from './block-type.enum';
+
+export class BlockDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  noteId: string;
+
+  @IsEnum(BlockTypeEnum)
+  @IsNotEmpty()
+  type: BlockTypeEnum;
+
+  @IsString()
+  @IsNotEmpty()
+  content: string;
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/libs/types/editor/book.dto.ts b/apps/backend/libs/types/editor/book.dto.ts
new file mode 100644
index 0000000..61467af
--- /dev/null
+++ b/apps/backend/libs/types/editor/book.dto.ts
@@ -0,0 +1,27 @@
+import { IsDate, IsNotEmpty, IsString, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+import { SectionDto } from './section.dto';
+
+export class BookDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  userId: string;
+
+  @ValidateNested({ each: true })
+  @Type(() => SectionDto)
+  sections: SectionDto[];
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/libs/types/editor/create.block.ts b/apps/backend/libs/types/editor/create.block.ts
new file mode 100644
index 0000000..86663df
--- /dev/null
+++ b/apps/backend/libs/types/editor/create.block.ts
@@ -0,0 +1,16 @@
+import { IsEnum, IsNotEmpty, IsString } from 'class-validator';
+import { BlockTypeEnum } from './block-type.enum';
+
+export class CreateBlockDto {
+  @IsString()
+  @IsNotEmpty()
+  noteId: string;
+
+  @IsEnum(BlockTypeEnum)
+  @IsNotEmpty()
+  type: BlockTypeEnum;
+
+  @IsString()
+  @IsNotEmpty()
+  content: string;
+}
diff --git a/apps/backend/apps/backend/src/api/user/dto/book.dto.ts b/apps/backend/libs/types/editor/create.book.dto.ts
similarity index 57%
rename from apps/backend/apps/backend/src/api/user/dto/book.dto.ts
rename to apps/backend/libs/types/editor/create.book.dto.ts
index af0f4fa..84ca6e6 100644
--- a/apps/backend/apps/backend/src/api/user/dto/book.dto.ts
+++ b/apps/backend/libs/types/editor/create.book.dto.ts
@@ -1,7 +1,11 @@
 import { IsNotEmpty, IsString } from 'class-validator';
 
-export class BookDto {
+export class CreateBookDto {
   @IsString()
   @IsNotEmpty()
   title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  userId: string;
 }
diff --git a/apps/backend/libs/types/editor/create.note.dto.ts b/apps/backend/libs/types/editor/create.note.dto.ts
new file mode 100644
index 0000000..a422884
--- /dev/null
+++ b/apps/backend/libs/types/editor/create.note.dto.ts
@@ -0,0 +1,17 @@
+import { IsNotEmpty, IsString, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+import { CreateBlockDto } from './create.block';
+
+export class CreateNoteDto {
+  @IsString()
+  @IsNotEmpty()
+  title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  sectionId: string;
+
+  @ValidateNested({ each: true })
+  @Type(() => CreateBlockDto)
+  blocks: CreateBlockDto[];
+}
diff --git a/apps/backend/apps/backend/src/api/user/dto/section.dto.ts b/apps/backend/libs/types/editor/create.section.dto.ts
similarity index 56%
rename from apps/backend/apps/backend/src/api/user/dto/section.dto.ts
rename to apps/backend/libs/types/editor/create.section.dto.ts
index 803b0be..7331e71 100644
--- a/apps/backend/apps/backend/src/api/user/dto/section.dto.ts
+++ b/apps/backend/libs/types/editor/create.section.dto.ts
@@ -1,7 +1,11 @@
 import { IsNotEmpty, IsString } from 'class-validator';
 
-export class SectionDto {
+export class CreateSectionDto {
   @IsString()
   @IsNotEmpty()
   title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  bookId: string;
 }
diff --git a/apps/backend/libs/types/editor/note.dto.ts b/apps/backend/libs/types/editor/note.dto.ts
new file mode 100644
index 0000000..50d1621
--- /dev/null
+++ b/apps/backend/libs/types/editor/note.dto.ts
@@ -0,0 +1,27 @@
+import { IsDate, IsNotEmpty, IsString, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+import { BlockDto } from './block.dto';
+
+export class NoteDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  sectionId: string;
+
+  @ValidateNested({ each: true })
+  @Type(() => BlockDto)
+  blocks: BlockDto[];
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/libs/types/editor/section.dto.ts b/apps/backend/libs/types/editor/section.dto.ts
new file mode 100644
index 0000000..cfb6fdb
--- /dev/null
+++ b/apps/backend/libs/types/editor/section.dto.ts
@@ -0,0 +1,27 @@
+import { IsDate, IsNotEmpty, IsString, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+import { NoteDto } from './note.dto';
+
+export class SectionDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  bookId: string;
+
+  @ValidateNested({ each: true })
+  @Type(() => NoteDto)
+  notes: NoteDto[];
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/libs/types/editor/update.block.dto.ts b/apps/backend/libs/types/editor/update.block.dto.ts
new file mode 100644
index 0000000..b82e145
--- /dev/null
+++ b/apps/backend/libs/types/editor/update.block.dto.ts
@@ -0,0 +1,20 @@
+import { IsEnum, IsNotEmpty, IsString } from 'class-validator';
+import { BlockTypeEnum } from './block-type.enum';
+
+export class UpdateBlockDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  noteId: string;
+
+  @IsEnum(BlockTypeEnum)
+  @IsNotEmpty()
+  type: BlockTypeEnum;
+
+  @IsString()
+  @IsNotEmpty()
+  content: string;
+}
diff --git a/apps/backend/libs/types/editor/update.note.dto.ts b/apps/backend/libs/types/editor/update.note.dto.ts
new file mode 100644
index 0000000..c7e611f
--- /dev/null
+++ b/apps/backend/libs/types/editor/update.note.dto.ts
@@ -0,0 +1,21 @@
+import { IsDate, IsNotEmpty, IsString, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+import { BlockDto } from './block.dto';
+
+export class UpdateNoteDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  title: string;
+
+  @IsString()
+  @IsNotEmpty()
+  sectionId: string;
+
+  @ValidateNested({ each: true })
+  @Type(() => BlockDto)
+  blocks: BlockDto[];
+}
diff --git a/apps/backend/libs/types/index.ts b/apps/backend/libs/types/index.ts
new file mode 100644
index 0000000..c6657aa
--- /dev/null
+++ b/apps/backend/libs/types/index.ts
@@ -0,0 +1,22 @@
+// Auth
+export * from './auth/login.user.dto';
+export * from './auth/signup.user.dto';
+
+// Editor
+export * from './editor/block-type.enum';
+export * from './editor/block.dto';
+export * from './editor/book.dto';
+export * from './editor/create.block';
+export * from './editor/create.book.dto';
+export * from './editor/create.note.dto';
+export * from './editor/create.section.dto';
+export * from './editor/note.dto';
+export * from './editor/section.dto';
+export * from './editor/update.note.dto';
+export * from './editor/update.block.dto';
+
+// User
+export * from './user/emailSubscription.dto';
+export * from './user/setting.user.dto';
+export * from './user/update.user.dto';
+export * from './user/user.dto';
diff --git a/apps/backend/libs/types/user/emailSubscription.dto.ts b/apps/backend/libs/types/user/emailSubscription.dto.ts
new file mode 100644
index 0000000..d92ffee
--- /dev/null
+++ b/apps/backend/libs/types/user/emailSubscription.dto.ts
@@ -0,0 +1,25 @@
+import { IsBoolean, IsDate, IsNotEmpty, IsString } from 'class-validator';
+
+export class EmailsSubscriptionDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsBoolean()
+  @IsNotEmpty()
+  announcements: boolean;
+
+  @IsBoolean()
+  @IsNotEmpty()
+  securityFeatures: boolean;
+
+  @IsBoolean()
+  @IsNotEmpty()
+  productUpgrades: boolean;
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/libs/types/user/setting.user.dto.ts b/apps/backend/libs/types/user/setting.user.dto.ts
new file mode 100644
index 0000000..84a0baa
--- /dev/null
+++ b/apps/backend/libs/types/user/setting.user.dto.ts
@@ -0,0 +1,23 @@
+import { IsDate, IsNotEmpty, IsString, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+import { EmailsSubscriptionDto } from './emailSubscription.dto';
+
+export class UserSettingsDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  emailsSubscriptionId: string;
+
+  @ValidateNested()
+  @Type(() => EmailsSubscriptionDto)
+  emailSubscription: EmailsSubscriptionDto;
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/libs/types/user/update.user.dto.ts b/apps/backend/libs/types/user/update.user.dto.ts
new file mode 100644
index 0000000..21ff308
--- /dev/null
+++ b/apps/backend/libs/types/user/update.user.dto.ts
@@ -0,0 +1,27 @@
+import { IsBoolean, IsEmail, IsOptional, IsString } from 'class-validator';
+
+export class UpdateUserDto {
+  @IsString()
+  @IsOptional()
+  name?: string;
+
+  @IsString()
+  @IsOptional()
+  userName?: string;
+
+  @IsEmail()
+  @IsOptional()
+  email?: string;
+
+  @IsString()
+  @IsOptional()
+  password?: string;
+
+  @IsString()
+  @IsOptional()
+  token?: string;
+
+  @IsBoolean()
+  @IsOptional()
+  isVerified?: boolean;
+}
diff --git a/apps/backend/libs/types/user/user.dto.ts b/apps/backend/libs/types/user/user.dto.ts
new file mode 100644
index 0000000..04d5d58
--- /dev/null
+++ b/apps/backend/libs/types/user/user.dto.ts
@@ -0,0 +1,57 @@
+import {
+  IsBoolean,
+  IsDate,
+  IsEmail,
+  IsNotEmpty,
+  IsOptional,
+  IsString,
+  ValidateNested,
+} from 'class-validator';
+import { Type } from 'class-transformer';
+import { BookDto } from '../editor/book.dto';
+import { UserSettingsDto } from './setting.user.dto';
+
+export class UserDto {
+  @IsString()
+  @IsNotEmpty()
+  id: string;
+
+  @IsString()
+  @IsNotEmpty()
+  name: string;
+
+  @IsString()
+  @IsNotEmpty()
+  userName: string;
+
+  @IsEmail()
+  @IsNotEmpty()
+  email: string;
+
+  @IsString()
+  @IsNotEmpty()
+  password: string;
+
+  @IsString()
+  @IsOptional()
+  token?: string;
+
+  @IsBoolean()
+  @IsNotEmpty()
+  isVerified: boolean;
+
+  @ValidateNested({ each: true })
+  @Type(() => BookDto)
+  books: BookDto[];
+
+  @ValidateNested()
+  @Type(() => UserSettingsDto)
+  @IsOptional()
+  settings?: UserSettingsDto;
+
+  @IsDate()
+  createdAt: Date;
+
+  @IsDate()
+  updatedAt: Date;
+}
diff --git a/apps/backend/package.json b/apps/backend/package.json
index 8fbbd8e..fb1817a 100644
--- a/apps/backend/package.json
+++ b/apps/backend/package.json
@@ -51,6 +51,7 @@
     "@nestjs/swagger": "^7.4.0",
     "@prisma/client": "^5.17.0",
     "bcrypt": "^5.1.1",
+    "class-transformer": "^0.5.1",
     "class-validator": "^0.14.1",
     "cookie-parser": "^1.4.6",
     "ioredis": "^5.4.1",
diff --git a/apps/backend/prisma/schema.prisma b/apps/backend/prisma/schema.prisma
index e745047..5699c6a 100644
--- a/apps/backend/prisma/schema.prisma
+++ b/apps/backend/prisma/schema.prisma
@@ -1,3 +1,4 @@
+// prisma/schema.prisma
 generator client {
   provider = "prisma-client-js"
 }
@@ -7,47 +8,59 @@ datasource db {
   url      = env("DATABASE_URL")
 }
 
+// User config
 model User {
   id         String  @id @default(cuid())
   name       String
   userName   String  @unique
   email      String  @unique
   password   String
-  token      String
+  token      String?
   isVerified Boolean @default(false)
 
-  books    Book[]
-  settings UserSettings @relation(fields: [userSettingsId], references: [id])
+  // Relationships
+  books          Book[]
+  settings       UserSettings? @relation(fields: [userSettingsId], references: [id])
+  userSettingsId String?       @unique
 
-  createdAt      DateTime @default(now())
-  updatedAt      DateTime @updatedAt
-  userSettingsId String
+  // Timestamps
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
 }
 
+// User settings
 model UserSettings {
   id String @id @default(cuid())
 
-  User                 User[]
-  emailsSubscriptionId String
+  // Relationships
+  user User? @relation
 
-  emailSubscription EmailsSubscription @relation(fields: [emailsSubscriptionId], references: [id])
+  emailsSubscriptionId String
+  emailSubscription    EmailsSubscription @relation(fields: [emailsSubscriptionId], references: [id])
 
+  // Timestamps
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 }
 
+// User email subscription
 model EmailsSubscription {
-  id           String         @id @default(uuid())
-  UserSettings UserSettings[]
+  id String @id @default(uuid())
 
+  // Relationships
+  userSettings UserSettings[]
+
+  // Subscription types
   announcements    Boolean @default(true)
-  SecurityFeatures Boolean @default(true)
-  ProductUpgrades  Boolean @default(true)
+  securityFeatures Boolean @default(true)
+  productUpgrades  Boolean @default(true)
 
+  // Timestamps
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 }
 
+// Book config
 model Book {
   id       String    @id @default(uuid())
   title    String
@@ -55,36 +68,66 @@ model Book {
   userId   String
   sections Section[]
 
+  // Timestamps
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 }
 
+// Section config
 model Section {
   id     String @id @default(uuid())
   title  String
   book   Book   @relation(fields: [bookId], references: [id])
   bookId String
-  notes  Note[]
+  notes  Note[] // Linking notes to sections
 
+  // Timestamps
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 }
 
+// Merged Note and Document model
 model Note {
   id        String  @id @default(uuid())
+  title     String // Title of the note
   section   Section @relation(fields: [sectionId], references: [id])
   sectionId String
-  // versions  NoteVersion[]
 
+  // Content of the note
+  blocks Block[]
+
+  // Timestamps
   createdAt DateTime @default(now())
   updatedAt DateTime @updatedAt
 }
 
-//? Implemented in future version
+// Block config, which represents individual content pieces in a document
+model Block {
+  id     String @id @default(uuid())
+  Note   Note   @relation(fields: [noteId], references: [id])
+  noteId String
+
+  // Content of the block (e.g., text, image, etc.)
+  type    typeEnum
+  content String
+
+  // Timestamps
+  createdAt DateTime @default(now())
+}
+
+enum typeEnum {
+  TEXT
+  IMAGE
+  LINKS
+  INTERNAL_LINK // Link to another note
+  // other types can be added here
+}
+
+// Uncomment this if you plan to implement versioning in the future
 // model NoteVersion {
 //   id        Int      @id @default(autoincrement())
 //   note      Note     @relation(fields: [noteId], references: [id])
-//   noteId    Int
+//   noteId    String
 //   content   String
 //   version   Int
 //   createdAt DateTime @default(now())
diff --git a/package.json b/package.json
index 1a885ce..07f2786 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,11 @@
   "name": "@noterai/monorepo",
   "version": "0.0.1",
   "description": "Alternative of Notion, with cool features and AI functionality",
+  "author": {
+    "name": "Himanshu",
+    "email": "hyattherate2005@gmail.com",
+    "url": "https://github.com/Himasnhu-AT"
+  },
   "main": "index.js",
   "scripts": {
     "pre-commit": "pnpm format && pnpm lint && pnpm build",
@@ -34,7 +39,6 @@
     "notes"
   ],
   "packageManager": "pnpm@9.11.0",
-  "author": "Himanshu <git:https://github.com/himasnhu-at>",
   "license": "ISC",
   "bugs": {
     "url": "https://github.com/Himasnhu-AT/noterAI/issues"