{
  "coordinates": "authored 960x640 input pixels; not output tracking",
  "landmarks": [
    {
      "name": "arm-root",
      "x": 295,
      "y": 350
    },
    {
      "name": "hook-tip",
      "x": 488,
      "y": 280
    },
    {
      "name": "shoulder",
      "x": 600,
      "y": 320
    },
    {
      "name": "pocket-back",
      "x": 770,
      "y": 300
    }
  ]
}