Receive an event when webhooks are created/updated


I’m looking for a way to do some action in my github app (running probot fwiw) when a webhook is added or updated. I was hoping performing that action would trigger a repository.edited event. However, it looks like there are very few things that actually trigger this event. This event seems like it would be the most appropriate place for a repository webhook being added/updated. Is there another event that would be triggered by this action? Or is this just not possible?