Stripe webhooks

Hello everyone,
I am trying to create a stripe webhook for sending a notification to user email (not customer) every time a customer adds credit card to his account. Talked with stripe support team but, the only information they gave me was too implement it through stripe webhooks.

Stripe has some notification that we can enable and that will send notifications to user email but, it doesn’t have a notification for when customer adds credit card details to his account and I am trying to implement that. Thanks in advance