{
  "manageEntity": {
    "action": "Save",
    "entityId": "599609",
    "entityType": "Track",
    "nonce": "0x6610a018eae622f701891a901c2ffbdf6cf09be9333c680c1e1746439aebc6ad",
    "signature": "0x6216fca5c8e0236feec94cbf10f6b57f79f6426d1663ade8b1dcc7c668dec9027692b8898e7f2f2d1bb6f691f06dd86a1fa82f74d2d1af636617e73a7c45cac71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}