{
  "manageEntity": {
    "action": "Save",
    "entityId": "1698297418",
    "entityType": "Track",
    "nonce": "0x022933604f7266e88fa6c3e9501e532f4df035ac3442c64cbb530f58c753166f",
    "signature": "0xb2079de920a417993ff04fe449e745a1a6ae2f16e543e242cc1432603b46b4d2785eb705b68fa4a60095654022f4a9fd70fc878e57508dfd33ceab0af7ff304d1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}