text: {
      "type": "AdaptiveCard",
      "body": [
          {
              "type": "Container",
              "minHeight": "150px",
              "backgroundImage": "https://adaptivecards.io/content/AlkiBeach.jpg",
              "items": [
                  {
                      "type": "TextBlock",
                      "text": "What a beautiful background"
                  }
              ]
          },
          {
              "type": "TextBlock",
              "text": "They can even repeat a bunch of different ways..."
          },
          {
              "type": "Container",
              "minHeight": "100px",
              "backgroundImage": {
                  "url": "https://adaptivecards.io/content/uparrow.png",
                  "fillMode": "Repeat"
              }
          },
          {
              "type": "Container",
              "backgroundImage": {
                  "url": "https://adaptivecards.io/content/uparrow.png",
                  "fillMode": "RepeatHorizontally",
                  "verticalAlignment": "Center"
              }
          },
          {
              "type": "Container",
              "minHeight": "100px",
              "backgroundImage": {
                  "url": "https://adaptivecards.io/content/uparrow.png",
                  "fillMode": "RepeatVertically",
                  "horizontalAlignment": "Center"
              }
          }
      ],
      "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
      "version": "1.2"
  }