Hello Paolo,
It will work as you will specify 2 different destinations on the routing table of the ASA.
It's going to be as simple as that,
Set the 2 interface, configured the proper NAT for those 2 interfaces, set the routes and finally the crypto map on the Wan2.
Regards,
Julio
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Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC