Adding m3u stream via jsonrpc http request


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

	"method": "core.tracklist.add",
    "jsonrpc": "2.0",
    "params": {
      "uri": "m3u:"
    "id": 1

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

    "jsonrpc": "2.0",
    "id": 1,
    "result": []


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