{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973099174",
    "entityType": "Track",
    "nonce": "0x7f5039b1d70473fd9920e49814302d8d8a860ee05f0a308070dfb2e6971fdca8",
    "signature": "0x9bf6e0a1997e420a23ae67d85d3b87fc590d6e9999ff015350ad1514fe1f6c8d53996a999015ba1b504c5a1efdbb4b95ad92a9a2e398de9d2850dbd6656d1ced1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}