Level2 - 50 best ask/bid orders

{
  "type": "message",
  "topic": "/contractMarket/level2Depth50:XBTUSDM",
  "subject": "level2",
  "data": {
    "asks": [
      ["9993", 3],
      ["9992", 3],
      ["9991", 47],
      ["9990", 32],
      ["9989", 8]
    ],
    "bids": [
      ["9988", 56],
      ["9987", 15],
      ["9986", 100],
      ["9985", 10],
      ["9984", 10]
    ],
    "ts": 1590634672060667000
  }
}

Topic:/contractMarket/level2Depth50:{symbol}

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