[ACTION] Hubspot CMS and Marketing API

[achammah]

Is there a specific app this action is for?
Marketing automation as many users rely on hubspot as a marketing automation platform (MAP). This should be fairly easy to implement given

Please provide a link to the relevant API docs for the specific service / operation.
CMS related doc:
Pages: https://developers.hubspot.com/docs/reference/api/cms/pages
Templates: https://developers.hubspot.com/docs/reference/api/cms/templates
Blog posts: https://developers.hubspot.com/docs/reference/api/cms/blogs/blog-posts

Marketing related doc:
Campaign: https://developers.hubspot.com/docs/reference/api/marketing/campaigns
Emails: https://developers.hubspot.com/docs/reference/api/marketing/emails/marketing-emails
Form: https://developers.hubspot.com/docs/reference/api/marketing/forms
Events: https://developers.hubspot.com/docs/reference/api/marketing/marketing-events
Subscription: https://developers.hubspot.com/docs/reference/api/marketing/subscriptions