{
  "manageEntity": {
    "action": "Save",
    "entityId": "1546",
    "entityType": "Track",
    "nonce": "0x8b5bef7bfb99afd2a92e90420a236b952b0d5e82e6601d9914b7817651b3ce5e",
    "signature": "0x010c6ed75aa7f3a471df1042791458488244bacfcb322fdb68c242aa3128ebd158266a490f86f7bee29318a7d66d7bd0e743e48fe1258aa8f71d26f583faa8f71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}