{
  "manageEntity": {
    "action": "Save",
    "entityId": "723111713",
    "entityType": "Track",
    "nonce": "0x58f305e484608139a39fb60ac9d305596064782e0870a756091f67c6a9664ba2",
    "signature": "0xe3c86ec4332d834385bfd2690757a90e604838c376be4e44c18640fc723f9f1c421e560a9a617766419340ad4a683a125f96799c8f63a5acbb3526f9732374ec1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}