How to use the public certificate validating Token for Webhooks in Coldfusion?

Hi,
Using the webhook scenario, how would we validate the Token in webhook using the OAuthAuthorization.cer from the https://developer.corrigopro.com/docs/authorization#section-token-validation (step 3)? We can successfully communicate with the servers to pull information, but we want Corrigo to push the information to us, yet we wish to maintain security during this process.