curl --request GET \
  --url https://api.elections.kalshi.com/trade-api/v2/series/{series_ticker}

{
  "series": {
    "ticker": "<string>",
    "frequency": "<string>",
    "title": "<string>",
    "category": "<string>",
    "tags": [
      "<string>"
    ],
    "settlement_sources": [
      {
        "name": "<string>",
        "url": "<string>"
      }
    ],
    "contract_url": "<string>",
    "contract_terms_url": "<string>",
    "product_metadata": {},
    "fee_type": "quadratic",
    "fee_multiplier": 123,
    "additional_prohibitions": [
      "<string>"
    ]
  }
}