{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192829168",
    "entityType": "Track",
    "nonce": "0xc4786177932ada329a4fb54d8b82930cc5be2fce7c77937f7e8b1af1de6f4d12",
    "signature": "0xa944e54971d2f42f623b49f934e42d80420a2ee20176dea8761242a80ffb11d64e5d9b1176734b5318d1bb31ffd0de36a10f633fb3a0c9ca192234fe66019eb71c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}