@errd you can configure the task listener in the UserTask activity of the eventType = “create”
The create event fires when the task has been created and all task properties are set. No other task-related event will be fired before the create event.
Read about the life cycle events of task-listener-event-lifecycle.
event (required) : the type of task event on which the task listener will be invoked. Possible events are: create , assignment , update , complete , delete and timeout ;
