{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249234530",
    "entityType": "Track",
    "nonce": "0x2dee57ed33b73dbb33af11b19d469761adb959c288c62db61bebacba988f4a2b",
    "signature": "0xb0af14018e2c144874c17891496c9fcc561091738a3163d04286720eb6d86ed630123e7c56c4aeaf36b3fdc17cdd9a9b8991e62863f71b8cacdcd91d25d9b2de1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}