{
  "keys": {
    "TEST-KEY-123": {
      "active": true,
      "expires": "2026-12-31 23:59:59",
      "device": "",
      "note": "Key mau, copy file nay thanh keys.json roi sua lai"
    },
    "UNLIMITED-DEVICE-DEMO": {
      "active": true,
      "expires": "2026-12-31 23:59:59",
      "device": "123456789012",
      "note": "device * cho phep dung nhieu may"
    }
  }
}