Carousel Ads

{
  "format_option_id": "product_carousel",
  "format_kind": "image_carousel",
  "params": {
    "min_cards": 3,
    "max_cards": 10,
    "slots": [
      { "asset_group_id": "cards", "asset_type": "card", "required": true, "min": 3, "max": 10 },
      { "asset_group_id": "landing_page_url", "asset_type": "url", "required": false }
    ]
  }
}

{
  "format_kind": "image_carousel",
  "assets": {
    "cards": [
      {
        "asset_type": "card",
        "headline": "Trail Pro",
        "media": { "asset_type": "image", "url": "https://cdn.acmeoutdoor.example/trail-pro.jpg" },
        "landing_page_url": { "asset_type": "url", "url": "https://acmeoutdoor.example/trail-pro" }
      },
      {
        "asset_type": "card",
        "headline": "Summit Pack",
        "media": { "asset_type": "image", "url": "https://cdn.acmeoutdoor.example/summit-pack.jpg" },
        "landing_page_url": { "asset_type": "url", "url": "https://acmeoutdoor.example/summit-pack" }
      },
      {
        "asset_type": "card",
        "headline": "Alpine Shell",
        "media": { "asset_type": "image", "url": "https://cdn.acmeoutdoor.example/alpine-shell.jpg" },
        "landing_page_url": { "asset_type": "url", "url": "https://acmeoutdoor.example/alpine-shell" }
      }
    ]
  }
}