It is possible to send event to a  custom rest url whenever something happens. To enable that you need to got the serer extensions in the admin client 

• enable the feature
• provide a rest url
• select a user with (at least read) access to the projects for which the events should be sent

Once you provided the information you need to configure which events should be sent for which projects

There are these possible events:

• item_edited
• item_created
• item_deleted
• sign_created
• sign_signed_full
• sign_signed_partial

Whenever an event is triggered a JSON blob will be sent to the provided URL, containing some meta data bout the event.

If you need more information processing the event, you can use the rest API to retrieve additional information as needed.