{
  "manageEntity": {
    "action": "Save",
    "entityId": "1526270384",
    "entityType": "Track",
    "nonce": "0x00e3d4762718a2d5b825bb0a2c0049f264e483d8af1cbd5cc58a3f0bd925b0aa",
    "signature": "0x57417e971174bbf302a13ca3e1f41470e745d4bb4f1a3f54935c8a4eb45006bf59df431076ff133403813212b44f75eebfa8f4bd4620f0ca8bd7a77768f55b131b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}