{
  "manageEntity": {
    "action": "Save",
    "entityId": "788878403",
    "entityType": "Track",
    "nonce": "0x1ce0264935880804643647d2e0159b69194243be4dc94b0695ae7dc1ae560f3c",
    "signature": "0x5d5920b0ee2842580d2111d715dba3634d4c260fef7ef841d06842959b71242a396a2f935257b207af60a9c77f70f20942eae46442cd6479a4a945221ee402711b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}