Radio addon json-rpc interface

I’m looking for the information about json-rpc intetface of Radio addon.
Especially, I wat to just start playing radiostations from MyStations folder.
Here’s an example of volume increment:
{“jsonrpc”:”2.0″,”method”:”Application.SetVolume”,”params”:{“volume”:”increment”},”id”:1 }

I found some others commands, but cannot find any help with Radio plugin.