{
  "session_id": "sess_1001",
  "user_id": "user_1001",
  "issued_at": "2026-03-14T13:40:00Z",
  "expires_at": "2026-03-14T14:10:00Z",
  "csrf_token": "csrf_9b31f4e2",
  "device": {
    "browser": "Chrome 135",
    "ip": "203.0.113.42"
  },
  "flags": [
    "mfa_verified",
    "download_enabled"
  ]
}