{
  "manageEntity": {
    "action": "Save",
    "entityId": "54569",
    "entityType": "Track",
    "nonce": "0x2340d2b8d81b1238d160f225285ae6830f7ebc10425278daaac4e888530de57d",
    "signature": "0xef72be09c7b18b5311968afb3c1e06cf7cb436e9c48f3494e50e5230eb2ef1c25ac0d7e90aaf046b98c8ce97dffa83023806f8a192d8b33ba19c246e63e8af751b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}