I would like to respond to a change made to the PSM (Personnal Status Message). I've not seen in the API reference that possibility.

Maybe I can check against an old value if I can access it I've seen that on Spaces websites on the top right corner of the web pages we can see a badge with the picture and the PSM of the current signed user, so if the badge can access the user personnal information, there's some API somewhere to do it.