{
  "manageEntity": {
    "action": "Save",
    "entityId": "696971394",
    "entityType": "Track",
    "nonce": "0xefd1ac08384704749f62b0ec9f2d7195ad839cdb4fbc42c77bcf60250ef87f6b",
    "signature": "0x4ac9aaa4e79e491e6ce6cb627841f46a457f4e177f12f998afea96773881bcdb06c1290578405ed71ffeab2833d344d98ba023d6926a13c9dd336859a06e0cc01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}