OptionaladdinAdd-in specific data
OptionalchangesProperty changes (for OBJECT_MODIFIED)
OptionalcolorColor associated with the event
Event type (from WHITEBOARD_EVENTS)
File ID this update belongs to
OptionalisWhether this is the final batch (laser pointer end)
OptionalobjectSerialized object data (for OBJECT_ADDED)
OptionalobjectObject ID (for object-related events)
OptionalpositionSingle position (for laser pointer)
OptionalpositionsBatched positions with timestamps (for laser pointer)
User who initiated the change
Whiteboard sync payload for real-time updates