{
  "manageEntity": {
    "action": "Save",
    "entityId": "167637507",
    "entityType": "Track",
    "nonce": "0x172b330350d9c7da782dae8191da546bad7dc335ae3acdc0b656ce950a3bfc4f",
    "signature": "0x54b860df02f93f295b6965d754a935dae971692a34515f1e3608ec5b38724e36628e24ac45ec05de2fd906452b38fb51ba7adef53d2c5793d5f59e559b30d22a1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}