In Jira Server, is it possible to customize the JSON payload that will be sent to WebHooks? In System Administration, I only see the the checkbox for an empty body to be sent to the URL, but I don't see where to customize the JSON body.
Looks like this may be possible in Jira Service Desk when configuring Automation, but I don't understand how to do it with WebHooks unrelated to JSD, in Jira System Administration. Is it possible without add-on apps?