Adding m3u stream via jsonrpc http request

General
1

I’m currently trying to add an m3u file over http request

{
	"method": "core.tracklist.add",
    "jsonrpc": "2.0",
    "params": {
      "uri": "m3u:http://dir.xiph.org/listen/200907/listen.m3u"
    },
    "id": 1
}

What exactly am I doing wrong? Because the response is:

{
    "jsonrpc": "2.0",
    "id": 1,
    "result": []
}
2

Did you get it working? I have almost the same question.
How to play a stream… maybe you can help me with that.