Javascript to display your last.fm scrobbles on a front-end

lastFmScrobbles.js

var lastFmApiKey = "xxyy";

var settings = {
  "async": true,
  "crossDomain": true,
  "url": "https://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&user=rounakdatta&api_key=" + lastFmApiKey + "&format=json",
  "method": "POST",
  "headers": {
    "Accept": "*/*",
    "Cache-Control": "no-cache",
    "Host": "ws.audioscrobbler.com",
    "Content-Type": "multipart/form-data; boundary=--------------------------122602628217122905448069",
    "Accept-Encoding": "gzip, deflate",
    "Content-Length": "",
    "Connection": "keep-alive",
    "cache-control": "no-cache"
  }
}

var lastfmData = "";

$.ajax(settings).done(function (response) {
  document.getElementById("allTracks").innerHTML = "<br>";
  console.log(response);
  lastfmData = response;

  let allTracks = lastfmData["recenttracks"]["track"];
  for (var i = 0; i < allTracks.length; i++) {
    let singleTrack = allTracks[i];
    let trackName = singleTrack["name"];
    let trackImage = singleTrack["image"][0]["#text"];
    let playbackUrl = singleTrack["url"];
    let epochTime = "";
    let timePlaying = "";

    try {
      epochTime = singleTrack["date"]["uts"];
      timePlaying = moment(moment.unix(epochTime).format('MMDDhhmmssA'), "MMDDhhmmssA").fromNow();
    } catch (err) {
      epochTime = "Now";
      timePlaying = epochTime;
    }

    let dataFormat = "<div class=\"row\"><div class=\"col-md-6\"><b>" + trackName + "</b><br>" + timePlaying + "</div><div class=\"col-md-4\">" + "<img src=\"" + trackImage + "\">" + "</div><div class=\"col-md-2\">" + "<a target='_blank' href=\"" + playbackUrl + "\"><img height='40px' width='40px' src=\"https://i.imgur.com/aslNp6D.png\"></a>" + "</div></div><hr style=\"border-top: dotted 1px;\">";
    document.getElementById("allTracks").innerHTML += dataFormat;
  }

});