{
  "manageEntity": {
    "action": "Save",
    "entityId": "1614705097",
    "entityType": "Track",
    "nonce": "0x567e86263f72e5de0c24d9c52fb56487f7b95646f001116a12229135e0c3161b",
    "signature": "0xdb8b61ca6447f356e52a955e6db567635cb154573a8d25a01c95c8d35572e1300b2c3bf0bf92062797a7d0f3abc5e3a61a13d7e6cb11a92127d14a120f3cb8501c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}