Android : What is a proper way to keep user settings synchronized with the server?

I can't think of a proper method to do this and I had no luck searching on the internet.

In a RESTful API I want to let the user change the settings. It would be easy with a PreferenceFragment (or the equivalent Activity) saving the data in the SharedPreferences but how can I keep that data synchronized with the server? e.g. Change the user name, change the alias, the notifications settings. That data must be in the server.

Is there a clean and easy way to do this, maybe adapting PreferenceFragment or perhaps some library?