Multi Cards

@Format('carousel', [{
          title: 'An article',
          subtitle: 'Subtitle',
          image: 'https://via.placeholder.com/600/92c952',
          buttons: [
               {
                 title: 'Website Link',
                 url: 'https://newbot.io'
              },
              {
                 type: 'postback',
                 title: 'Add to cart',
                 payload: 'action?add=1'
              }
          ]
     }]
)
> Hey

For the payload, either you perform an action (see the @action decorator) or you use the magic variable :payload