The id of the admin or team which will be assigned the conversation. A conversation can be assigned both an admin and a team.\nSet 0 if you want this assign to no admin or team (ie. Unassigned).
body
string
Optionally you can send a response in the conversation when it is assigned.
{"message_type": "assignment","type": "admin","admin_id": "12345","assignee_id": "4324241","body": "Let me pass you over to one of my colleagues."}