JSON format for engagement recording

recording.json

[
  {
    "step": 1,
    "time_offset": 0,
    "movements": [[123, 31], [321,22], [null, null], [99, 99]],
    "actions": [
      {"time_offset": 4032, "input_type": "keyboard", "value": "spacebar"}, 
      {"time_offset": 8944, "input_type": "mouse", "value": [123,321]}
    ],
    "distance": 3245,
    "time_spent": 3910,
    "completed": true
  },
  {
    "step": 2,
    "time_offset": 3910,
    "time_spent": 3000,
    "completed": true
  },
  {
    "step": 1, 
    "time_offset": 6940,
    "time_spent": 1933,
    "completed": false
  }
]