https://api.data.payoff.ch/v2/underlyings/CA21037X1006

{
    "isin": "CA21037X1006",
    "symbol": null,
    "valor": null,
    "name": "Constellation Software",
    "assetClass": null,
    "tradingExchangeName": null,
    "bid": null,
    "ask": null,
    "bidSize": null,
    "askSize": null,
    "last": null,
    "lastDateTime": null,
    "change": null,
    "ttsId": null
}