{
  "manageEntity": {
    "action": "Save",
    "entityId": "352385",
    "entityType": "Track",
    "nonce": "0xa45a94129a8b9df12d5c97d9e505de1434278ef4ef06bf0718caaddcdebd1242",
    "signature": "0xb14de135f50c89d6ec39f0bd29430c1a73cbbebcc0377c6e10e609e54dedc06b63359b1b74890294a482bb28105e8a76831fb3feea6de8287d412d0232fa11ee1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}