Guide to setup mappings to external storefronts.
[ { "externalStorefrontId": "STORE-001", "countries": ["SE", "NO", "DK"] }, { "externalStorefrontId": "STORE-002", "countries": ["GB"] }, { "externalStorefrontId": "STORE-003", "countries": ["US"] }, { "externalStorefrontId": "STORE-004", "countries": [] } ]