Logo bar section settings - https://www.shopify.com/partners/blog/logo-bar

logo-bar-section-setting.json

"blocks": [
      {
        "type": "logo_image",
        "name": "Logo",
        "settings": [
          {
            "type": "image_picker",
            "id": "image",
            "label": "Image"
          },
          {
            "type": "url",
            "id": "link",
            "label": "Link",
            "info": "Optional"
          }
        ]
      }