Get list of webinar tariffs

{
    "results": [
        {
            "plan_webinar_id": 1,
            "participants": 1,
            "title": "test",
            "type": "webinar_intro",
            "price_rub": 0,
            "price_usd": 0,
            "resolution": "2K",
            "index": 0,
            "discount": {
                "month": 0,
                "year": 10
            }
        }
    ]
}