{
  "manageEntity": {
    "action": "Save",
    "entityId": "1196355042",
    "entityType": "Track",
    "nonce": "0x012ab328d504b4dfe1d8497494afdc4a79e096976a1e0537817d3397539bef8b",
    "signature": "0x86086f6aa3099ea7e10ed109ed00745b6f682489f96a2a363e32cddb569d091a17ad7f428aaa6136787950fb7f57f4ef65dabcdb93b1f5fa9551a1c4c22b986e1b",
    "signer": "0xFB1D43C768E2C6359F2e1c154f6C5f9187F343e7",
    "userId": "166447128"
  }
}