The message is send to all users or not.
The message is send by me or not.
The message ID of the transcription message.
The receiving user.
The sender's display name. Always populated; useful when
senderUser is missing (e.g. broadcast streaming viewer chats).
The sender user. Absent for chats from a broadcast streaming viewer,
where only a display name is available — see senderName.
Time stamp of the transcription message.
The message content.