Unique key for the party being identified.
Name of the identity
Type of the identity
The unique identifier of the user (e.g., CRM user id) if they are logged in.
Optional creationEvent id of the engagement event that caused this to be created. For example, a user registration or user profile event.
Optional creationEvent object type of the engagement event that caused this to be created. For example, UserEngagement.
Event providing information about the user ID of a user (identified by a deviceId) sending events.