{
  "manageEntity": {
    "action": "Save",
    "entityId": "374408328",
    "entityType": "Track",
    "nonce": "0xe795c6956a581f0c4ca27ee92289339a7c07353884859957aee110494c319c37",
    "signature": "0x4ee5a52226f909a47eceb9901aa7c97458da21ff068945e802750342c25c26495a8794223daadf2f1e1dc98983bbacf9ae11e65f2360e62a64e8a756da1f9a2b1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}