Stripe Connect: Help to fetch the object / ID created on the Client Side for use in Server Side

My setup:
When I click a ‘save card’ button, a createPaymentMethod() action by the Stripe Card Element generates an ID (pm_1J0BDjBfY9idGe2ue3fYcOz4) on the client side.

How can the server side components retrieve that ID?

Thanks all.