{
  "manageEntity": {
    "action": "Save",
    "entityId": "19122",
    "entityType": "Track",
    "nonce": "0xe79f9ea5d87c10f68e291a1aaa474d3c1c748689e9a60d9e0f436117a5cb9d66",
    "signature": "0xe5481d39b4826297aadcf1175fda261ce78d412b111e66e6c5ed885b4851030d155310e0ed2a3b0591e514d88bc9994b297f0872b66b6c8ec7c727da949772bf1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}