{
  "manageEntity": {
    "action": "Save",
    "entityId": "434441538",
    "entityType": "Track",
    "nonce": "0x97b8d6ae652ed3259f8bd05c94fef334c15a7500c4456cd9da6dd8020edb46ee",
    "signature": "0xf837383949029f8aa8118611e723d4b6420ccde501b3ce7be38a2501e5c933542dfd082f5dc3cb4262c5e3df5439d4d2646a31e486c729e2f9a26f3c9936dc811c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}