type: object
required:
  - content
properties:
  content:
    type: string
    description: The content of the message
  message_type:
    type: string
    enum: ['outgoing', 'incoming']
  private:
    type: boolean
    description: Flag to identify if it is a private note
  content_type:
    type: string
    enum: ['input_email', 'cards', 'input_select', 'form' , 'article']
    example: 'cards'
    description: 'if you want to create custom message types'
  content_attributes:
    type: object
    description: attributes based on your content type
