Creates a note in a conversation.

The note body must be less than 1000 characters. Attachment-only notes are also accepted.

The note body supports mentioning of users by using the @ symbol followed by the user's ID wrapped in double curly brackets. For example, @{{12}} will mention the user with ID 12. A mentioned user will be notified of the mention via email/SMS/push notifications, depending on their notification settings.

If there is no contact corresponding to the to parameter for the organization, a new contact will be created, along with a conversation with the from number channel. If there is an existing contact but no conversation, a new conversation will be created.

The opt_in_to_all_channels and opt_in_to params are optional and they will be processed in the cases where a new contact is created. These params reflect which of the organization channels the contact will be opted in to.