Type of event (e.g., "rmaker.event.node_params_changed")
OptionalmetadataOptional metadata specific to the channel Examples:
ID of the node that was updated
The actual parameter data Format: { deviceName: { paramName: value } }
Source channel that provided this update (e.g., "notification", "matter", "mqtt")
Standardized format for node parameter updates from any subscription channel. All subscription channels must transform their data into this format.