Link between analytics API (customer events) and webhook events (notifications)?

Hello.

I’m trying to track a user from a page_viewed event (in the customer events), for example, and a “cart creation” event (in the webhooks).

All I see in the former is clientId and id. None of those formats seem to match the token and id that I’m getting in the later.

Is there a way?

My goal is to record a user journey, from page view to cart creation (and further). Maybe there is a better approach. Let me know.