OptionaleventOptionalpublisherThis is the service that published this event.
OptionalresourceThe resource object that carries specific information about the event. The object must have the ServiceEventObject applied for serialization/deserialization to work.
OptionalresourceThis dictionary carries the context descriptors along with their ids.
OptionalresourceThis is the version of the resource.
This is the id of the type. Constants that will be used by subscribers to identify/filter events being published on a topic.