HoldResponse

{
    "hold_hash": "Xy7kRtQmNpLsWvBzJcFdEaHgUiOeYtAn",
    "expires_at": "2026-06-03T18:30:00+00:00",
    "expires_in_seconds": 1800,
    "slot": {
        "date": "2026-06-10",
        "time": "09:00",
        "course": {
            "id": 1,
            "name": "BLS — Annual Renewal"
        }
    }
}