Why is my created Webhook Id Node SDK different from the request headers?

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Hi! I've successfully implemented the webhook creation form the SDK. The problem is that the created webhook id is different from the one i'm receiving within the request headers.
Ex.
Creation phase: 120XXXXXXX235
Request headers: 0c2ba505-xxxx-xxxx-xxxx-xxxxbedd43c5

Is this an intended behavior? Is there any way for me to filter off the unwanted event?
I would need an identifier because in my case, the webhook is related to the user (and multiple users can receive the event).