{
  "response": {
    "returncode": "SUCCESS",
    "tracks": [
      {
        "href": "http://captions.example.com/foo.json",
        "kind": "captions",
        "label": "English",
        "lang": "en-US",
        "source": "live"
      },
      {
        "href": "http://captions.example.com/foo.json",
        "kind": "captions",
        "label": "English",
        "lang": "en-US",
        "source": "live"
      },
      {
        "href": "http://captions.example.com/foo.json",
        "kind": "captions",
        "label": "English",
        "lang": "en-US",
        "source": "live"
      }
    ]
  }
}