How to display Caption Korea

Hi all
I want create caption by korea language
But in shotstack not display
I set font-family Arial Unicode MS or Noto Sans KR but it not show

This is my api

{
    "timeline": {
        "background": "#FFFFFF",
        "tracks": [
            {
                "clips": [
                    {
                        "asset": {
                            "type": "video",
                            "src": "https://apitoktak.voda-play.com/voice/video/5.mp4"
                        },
                        "start": 0,
                        "length": 5
                    },
                    {
                        "asset": {
                            "type": "html",
                            "html": "<div style='font-size: 40px; color: #080000;  text-align: center; font-family: 'Arial Unicode MS', sans-serif;'>XXXXX Gà con<br> 안녕하세요! 반갑습니다.</div>",
                            "css": "div { font-weight: bold; font-family: 'Arial Unicode MS', sans-serif; background: #fff700; border-radius: 10px; border-radius: 40px;}" 
                        },
                        "start": 0,
                        "length": 5,
                        "position": "top",
                        "offset": {
                            "x": 0,
                            "y": 0.4
                        }
                    },
                    {
                        "asset": {
                            "type": "html",
                            "html": "<div style='font-size: 40px; color: white; background: rgba(0, 0, 0, 0.5); padding: 20px; text-align: center; font-family: \"Noto Sans KR\", sans-serif;'>안녕하세요! 반갑습니다.</div>",
                            "css": "div { font-weight: bold; font-family: 'Nanum Gothic', sans-serif; }",
                            "width": 500,
                            "height": 300,
                            "background": "#fff700",
                            "position": "center"
                        },
                        "start": 2,
                        "length": 4
                    }
                ]
            }
        ]
    },
    "output": {
        "format": "mp4",
        "quality": "veryhigh",
        "size": {
            "width": 720,
            "height": 1280
        }
    }
}

You need to reference the font file:

{
  "output": {
    "format": "mp4",
    "size": {
      "width": 720,
      "height": 1280
    },
    "quality": "veryhigh"
  },
  "timeline": {
    "fonts": [
      {
        "src": "https://shotstack-assets.s3.amazonaws.com/fonts/notosanskr-regular.otf"
      }
    ],
    "background": "#FFFFFF",
    "tracks": [
      {
        "clips": [
          {
            "asset": {
              "type": "video",
              "src": "https://apitoktak.voda-play.com/voice/video/5.mp4"
            },
            "start": 0,
            "length": 5
          },
          {
            "start": 0,
            "length": 5,
            "position": "top",
            "asset": {
              "type": "html",
              "html": "<div style='font-size: 40px; color: #080000;  text-align: center; font-family: 'Arial Unicode MS', sans-serif;'>XXXXX Gà con<br> 안녕하세요! 반갑습니다.</div>",
              "css": "div { font-weight: bold; font-family: 'Noto Sans KR', sans-serif; background: #fff700; border-radius: 10px; border-radius: 40px;}"
            },
            "offset": {
              "x": 0,
              "y": 0.4
            }
          },
          {
            "asset": {
              "css": "div { font-weight: bold; font-family: 'Noto Sans KR', sans-serif; }",
              "background": "#fff700",
              "width": 500,
              "html": "<div style='font-size: 40px; color: white; background: rgba(0, 0, 0, 0.5); padding: 20px; text-align: center; font-family: \"Noto Sans KR\", sans-serif;'>안녕하세요! 반갑습니다.</div>",
              "position": "center",
              "type": "html",
              "height": 300
            },
            "start": 2,
            "length": 4
          }
        ]
      }
    ]
  }
}