Call to eventChange event

I’m using FullCalendar 6.1 with rrule plugin. I have set editable:true so that I can drag existing events. I’m not planing on dropping external events. The documentation says evenChange is called after eventDrop and eventResize, so I’m guessing I need to make ajax call in eventChange to update database. After the Ajax call to update database, how do I render calendar? I looked around but I cannot seem to find an example that uses eventChange. I was wondering how definition of function looks like e.g

eventChange: function (info) {
...
}