{
  "coordinates": "authored 960x640 input pixels; not output tracking",
  "landmarks": [
    {
      "name": "small-bead",
      "x": 300,
      "y": 240
    },
    {
      "name": "large-disc",
      "x": 360,
      "y": 190
    },
    {
      "name": "first-slot",
      "x": 300,
      "y": 360
    },
    {
      "name": "tray-floor",
      "x": 480,
      "y": 515
    }
  ]
}