{
  "video": {
    "camera_left": {"original_key": "observation.images.left"},
    "camera_right": {"original_key": "observation.images.right"},
    "camera_side": {"original_key": "observation.images.side"}
  },
  "state": {
    "control_signal": {"start": 0, "end": 1}
  },
  "action": {
    "control_signal": {"start": 0, "end": 1}
  },
  "annotation": {
    "task": {"original_key": "task_index"}
  }
}