{
  "manageEntity": {
    "action": "Save",
    "entityId": "957444937",
    "entityType": "Track",
    "nonce": "0x47bccd83f24ebf2ba22b9ca7d3e5032828b9eafd3d8155026ec10f2fd18d4c75",
    "signature": "0xb59db38ed3e5e4429535068b35d8cab21ae770f48ad7c8b57c44e830da4f23d762a7b5363c2eabee35b48efad752b7cab6f0a1899a95a23724d93b1b80bab1f81c",
    "signer": "0x9c1a2996a6DCe12e947BD7C8A755b6150A3eD5f4",
    "userId": "474113241"
  }
}