{
  "manageEntity": {
    "action": "Save",
    "entityId": "1065429448",
    "entityType": "Track",
    "nonce": "0x44b1233c142dfdc9a3ef1c20582c5036fa4b078b242a6c2adb4520ae97e3c275",
    "signature": "0xc2f2a4cf169d2b17bdad4828b5a2584dbe8f1eb33120408a6fa84219d2022ea52e9e644cf6061dfbf8a7eb3b8f5ebd821ec07c118f360785ea297f83eefa60521b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}