Normalize dot object keys' values

[konstantin-tarasov-clearscale]

Let's assume I receive an object from a server like

{"FieldName.Items[0].Email": ["Invalid email"]};

This library provides a possibility to change values to invalid-email.

May I process keys' values?
I'd like to normalize the case of keys to

{
   fieldName: {
      items: [
         email: ["Invalid email"]
      ]
   }
}