{
  "bd46cf7b4c8d4069b8a19e936253db74": {
    "352": {
      "name": "stair",
      "visible_pos": [
        2,
        3,
        4,
        5,
        6,
        7
      ],
      "bbox2d": [
        [
          355,
          420,
          285,
          60
        ],
        [
          230,
          352,
          305,
          128
        ],
        [
          187,
          348,
          245,
          132
        ],
        [
          32,
          400,
          413,
          80
        ],
        [
          253,
          442,
          151,
          38
        ],
        [
          227,
          446,
          54,
          34
        ]
      ]
    }
  }
}