{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277964778",
    "entityType": "Track",
    "nonce": "0x890cb27513e92cecf998e337ed0563624a2b1ae82fa2baf09706225ba31dc8dc",
    "signature": "0xc61fb7e0fff7e34e89b44d05f0adbac1c56d5337eafaa87b28e703f2d11d5e616f71c8d3db68391ea95a19bdb621b43a051a5c8c72ddb99041c7d4630b07afd71b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}