code: public Map<String, Object> toActorJSON() {
  		final HashMap<String, Object> actor = new LinkedHashMap<String, Object>();
  		actor.put("objectType", "person");
  		actor.put("id", this.id);
  		actor.put("displayName", this.displayName);
  		return actor;
  	}
docs: parse the user to an Actor (Object) JSON map
  
  @return Actor (Object) JSON map representing this user<br>
  (Activitystrea.ms)