如圖上顯示
現在遇到一個問題是 要怎麼上傳各個區塊的圖片

rich menu已經用api 產生好了 現在遇到圖片上傳問題 因為一個rich menu 只能上傳一張圖片不知道要怎麼實現把各個區塊上傳不同的圖片，求大神幫忙一下 感恩!
rich menu 建置格式如下圖

{
    "size": {
      "width": 2500,
      "height": 1686
    },
    "selected": false,
    "name": "richmenu-1",
    "chatBarText": "功能選單",
    "areas": [
      {
        "bounds": {
          "x": 0,
          "y": 0,
          "width": 833,
          "height": 843
        },
        "action": {
          "type": "message",
          "label": "常見問題",
          "text": "常見問題"
        }
      },
      {
        "bounds": {
          "x": 833,
          "y": 0,
          "width": 833,
          "height": 843
        },
        "action": {
          "type": "uri",
          "label": "即時新聞與活動",
          "uri": "https://www.wranb.gov.tw/2448/3448/3449/"
        }
      },
      {
        "bounds": {
          "x": 1667,
          "y": 0,
          "width": 833,
          "height": 843
        },
        "action": {
          "type": "message",
          "label": "供水系統與管網圖",
          "text": "供水系統與管網圖"
        }
      },
      {
        "bounds": {
          "x": 0,
          "y": 843,
          "width": 833,
          "height": 843
        },
        "action": {
          "type": "uri",
          "label": "集水區雨量統計",
          "uri": "https://www.wranb.gov.tw/3452/23105/25398/25395/"
        }
      },
      {
        "bounds": {
          "x": 833,
          "y": 843,
          "width": 833,
          "height": 843
        },
        "action": {
          "type": "message",
          "label": "節約用水",
          "text": "節約用水"
        }
      },
      {
        "bounds": {
          "x": 1666,
          "y": 843,
          "width": 833,
          "height": 843
        },
        "action": {
          "type": "uri",
          "label": "水利署專屬網站",
          "uri": "https://www.wra.gov.tw/cp.aspx?n=8388"
        }
      }
   ]
}