{
  "manageEntity": {
    "action": "Save",
    "entityId": "958467952",
    "entityType": "Track",
    "nonce": "0x461441c2d0bd0b3464ea005857ce2616273f152a6d64872e074f75b6b97e3dc2",
    "signature": "0xe9e504b33fff98444ffb91e478e8e85efc129e02f02608c1196a9cef6c994e932ae502ae34e94962813d1b738eaa1ecc14a1bfa5ba18659f1ed9b1969c882e091c",
    "signer": "0x942718Ab5Bbd4d3d72d5017F886E3ac4Ef2b927e",
    "userId": "362766655"
  }
}