获取深度

curl https://cloud-api.wooxpro.com/contract/public/depth?symbol=BTCUSDT

{
  "code": 1000,
  "message": "Ok",
  "trace": "b9bff62d-9ac8-4815-8808-8f745673c096",
  "data": {
    "asks": [
      [
        "23935.4",
        "65",
        "65"
      ]
    ],
    "bids": [
      [
        "23935.4",
        "65",
        "65"
      ]
    ],
    "timestamp": 1660285421287,
    "symbol": "BTCUSDT"
  }
}