Imagemap message in LINE Messaging API

ImagemapMessage.js

const functions = require("firebase-functions");
const request = require("request-promise");

const LINE_MESSAGING_API = "https://api.line.me/v2/bot/message";
const LINE_HEADER = {
  "Content-Type": "application/json",
  "Authorization": "Bearer <CHANNEL-ACCESS-TOKEN>"
};

exports.AdvanceMessage = functions.https.onRequest((req, res) => {
  return request({
    method: "POST",
    uri: `${LINE_MESSAGING_API}/push`,
    headers: LINE_HEADER,
    body: JSON.stringify({
      to: "<USER-ID>",
      messages: [
        {
          type: "imagemap",
          baseUrl: "https://charabizasia.files.wordpress.com/2017/07/main-1.jpg?w=1040",
          altText: "This is an imagemap",
          baseSize: {
            width: 1040,
            height: 623
          },
          video: {
            originalContentUrl: "https://mokmoon.com/videos/Brown.mp4",
            previewImageUrl: "https://linefriends.com/img/bangolufsen/img_og.jpg",
            area: {
              x: 260,
              y: 155,
              width: 540,
              height: 360
            },
            externalLink: {
              linkUri: "https://line.me",
              label: "See More"
            }
          },
          actions: [
            {
              type: "uri",
              linkUri: "https://developers.line.biz",
              area: {
                x: 0,
                y: 0,
                width: 320,
                height: 320
              }
            },
            {
              type: "message",
              text: "Hello",
              area: {
                x: 720,
                y: 303,
                width: 320,
                height: 320
              }
            }
          ]
        }
      ]
    })
  }).then(() => {
    return res.status(200).send("Done");
  }).catch(error => {
    return Promise.reject(error);
  });
});