This method has the function of executing an FX.

Prior to the request, the "x-santander-client-id" in the header must be configured in PagoNxt Trade to one or more customer_id.
A X reference (quote_id as a trade identifier not the quote) is needed to be able to execute the FX and make it firm.

In the query_params, there is a customer_id field, which has the following functionality:

• If for an "x-santander-client-id" there is only one parameterised customer_id in the PagoNxt systems, the query_params does not need to be informed, it would be optional.
• If for an "x-santander-client-id" there is more than one parameterised customer_id in PagoNxt systems, the query_params customer_id becomes mandatory, and additionally the API validates that the customer_id corresponds to those parameterised in PagoNxt Trade, if it does not match, the request is rejected.