Dual dynamic wan and dual LANs

Hi, I’m a little lost on how to proceed because my knowledge of Mikrotik is quite poor, especially in multiwan enviroments.

A client has 2 ISPs with dynamic public IP and two LAN networks. Now the two ISPs are working in failover mode, ISP1 with a distance 10 and ISP2 with 20, so the two LANs are routed through ISP1 and through ISP2 if 1 is down.

But I need that LAN1 go through ISP1 and failover to ISP2, and that LAN2 go through ISP2 and failover to ISP1. Each LAN have different subnets and are connected to different eth interfaces.

Any help will be more than appreciated! Thanks.