Support for event "ua-profile" and content-type "application/simservs-xml"

I have been reading and I don’t find a positive information, so I guess what I want is not supported. Anyway, I want to ask here to see if anyone has an idea on how to do it:
What I want to do is to FreeSWITCH to send a NOTIFY when a user enable/disable Call Forwarding with an event “ua-profile” with Content Type “application/simservs+xml”. The user should be automatically subscribe for events “ua-profile”, so it won’t send a subscribe.
Why I want to do this? I’m trying to replicate/simulate a customer requirement. They are using IMS and their Application Server is doing what I described.