How to trigger user defined events using rest api ?

I am developing a web application using rest api. I want to list all user defined events and when user click on it i want to trigger event.

From the doc i am able to see rest api for list User defined event.

/API/rest/v1/eventTypeGroups/{id}/userDefinedEvents

How to trigger User Defined Events event ?

Please look at the new Events rest API (currently in beta)..

https://doc.developer.milestonesys.com/mipvmsapi/api/events-rest/v1/