{
  "manageEntity": {
    "action": "Save",
    "entityId": "863830",
    "entityType": "Track",
    "nonce": "0xe2fa511f04ee5b8fcaf0e4fb8eeccf0e30a25871a513bba2e3130f9290cbcb85",
    "signature": "0x467f0433cb937b93b871726e9431da2188723c568fcdef0dd313519f3c604da522e98d4b7a9a4f6fd1c02079a37350f55ab1a55c3f0f1c52ab9fe2f3ebfb89431c",
    "signer": "0x4089d1751487aA665C895419F2578a6Cf33BE481",
    "userId": "728155533"
  }
}