{
  "manageEntity": {
    "action": "Save",
    "entityId": "1005864348",
    "entityType": "Track",
    "nonce": "0x8198b7d8f59be1d9121ea8e7fcde73ee74a3156a34dfa75950fa760273728005",
    "signature": "0x6d39ecdde3f1f0a98af98de497552ed23d061993d17cb72ce0b171ac456e286d37850f385d19b684338a3728ead30cf006b79d5ec8d71801dbeb80ae1580a8771b",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}