type: object
properties:
  meta:
    type: object
    properties:
      sender:
        type: object
        properties:
          id:
            type: number
            description: ID fo the sender
          name:
            type: string
            description: The name of the sender
          thumbnail:
            type: string
            description: Avatar URL of the contact
          channel:
            type: string
            description: Channel Type
      assignee:
        $ref: '#/definitions/user'