code: public static void subscribe (Activity context, Entity e, SubscriptionType type, SubscriptionResultListener listener) {
  		subscriptionUtils.subscribe(context, e, type, listener);
  	}
docs: Subscribes the current user to notifications for new comments on this entity.
  @param context The current context.
  @param e The entity.
  @param type The subscription type.
  @param listener A listener to handle the result.