{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666469057",
    "entityType": "Track",
    "nonce": "0x399e6779d760df3ea19ca708ce3fe7078aa068aed9755ca8f25a2a663848579b",
    "signature": "0xf82da10462a61ed922831f6725d8c21bed8a677b99851067b6526f424771070b35a96bda287d003e71294c2e9f13aaad6807fd443d0ce294543085b686c5bf9f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}