payment_method_object = Stripe::PaymentMethod.retrieve(params["paymentMethod"])

card_details {
  "address_country" => payment_method_object.billing_details.address.country,
  "address_zip" => payment_method_object.billing_details.address.postal_code,
  "name" => payment_method_object.billing_details.name
}

card_details.merge(somethingElse)