OptionalChangeThe change id of the state change this event relates to, when it relates to one. A
'state_changed' event carries the id the change was assigned; a 'frame_pushed' event
carries the id of the state its frame was captured at — so a consumer can check that the
pixels and the state they are describing agree.
The emitting channel's key.
The emitting instance's id (see BaseRealtimeChannelClient.InstanceId).
The event name (e.g. 'state_changed', 'opened', 'frame_pushed').
When the event was emitted (epoch ms).
The event payload.
One event a channel emitted on BaseRealtimeChannelClient.Events$.