A Thread Member identifies a user or group who is taking part in the Message Thread. The thread will be visible in their task queue if it is not acknowledged.

{
  "id": 140758503522396,
  "thread": 140758503456859,
  "user": 64,
  "group": null,
  "status": "Requiring Action",
  "ack_time": null
}

Attribute	Type	Allowed Values	Description
id	int		The id of the thread member.
thread	int		The id of the thread this thread member is a member of.
user	int		The id of the user referenced by this thread member. Should only ever be one of either a user or group set for the thread member.
group	int		The id of the group referenced by this thread member. Should only ever be one of either a user or group set for the thread member.
status	string	Addressed, Requiring Action	Whether this member has acknowledged the message thread.
ack_time	datetime		The time at which the member acknowledge the message thread.