{
  "manageEntity": {
    "action": "Save",
    "entityId": "801356",
    "entityType": "Track",
    "nonce": "0xfac4aaccd6956528f0dd95b70b13cf27c831aa042bff3f959c64df7423744de4",
    "signature": "0xd8cd6c08dbbc6d3c4af090f02e0f42d471e102cf17cb55b7e5ced26cbbd11d4e37d3c23e0733a6ca94f05851a71e3f4481e87cfd03d46fa1fc7b31585c09c7781c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}