You can create a message that has been initiated by an admin. The conversation can be either an in-app message or an email.
Sending for visitors
There can be a short delay between when a contact is created and when a contact becomes available to be messaged through the API. A 404 Not Found error will be returned in this case.
This will return the Message model that has been created.
Retrieving Associated Conversations
As this is a message, there will be no conversation present until the contact responds. Once they do, you will have to search for a contact's conversations with the id of the message.