{
  "manageEntity": {
    "action": "Save",
    "entityId": "1981517633",
    "entityType": "Track",
    "nonce": "0xabaf1cb5e86cff77d89a42e2c748259276ecee9aa73feb5b2fd5281c7405d75a",
    "signature": "0xf82d1d6dcffc9233a7697426cef73d2387034f49af40da62eee86c89788ef3144761ffbfafaac843167a21179f65a13662e77713f90ad3258c95d17ac823f70b1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}