{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458078217",
    "entityType": "Track",
    "nonce": "1792305541089371308",
    "signature": "0x4ab80541f6d16aaf27c10eb75501d2f60f6f39b08b453ba1715b0af15ea72995764ed0dbfaa98447638a5860396e5b0d95692180a7de7f8ec774678087d057dc1b",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}