Verify data by using sign and a public certificate in ASP.NET Core

Hi Team,
I am trying to validate my Webhook request in Asp.Net Core when receiving new workorder notification from Corrigo and I got the hit on my specified controller but before preceding further I want to validate my request header token as mentioned in :

https://developer.corrigopro.com/docs/authorization#section-token-validation

Can you please guide me in this scenerio...