File download using AJAX, jQuery and PHP

Question

I am working on document management related system and stuck in an issue for long time. I have below mentioned jQuery code which calls a PHP API which returns binary data (image also attached with the post.

My jQuery code creates a blob url like "*blob:https://example.com/16b68a7c-b773-4320-9805-ebc1675e6745*" and it loads the url in a window after triggering click of but it didn't load any thing in the browser neither downloads any file.

Please note that I want to download file with file name which will be generated after binary data conversion (dynamically) from response.

My jQuery Code:

$.ajax( '<?php $base_url ?>',
    {
        data: docDeleteParams,
        type: "POST",
        'dataType' : 'binary',
        'xhrFields' : {
            'responseType' : 'blob'
        },
       xhr: function () {
           var xhr = new XMLHttpRequest();
           xhr.onreadystatechange = function () {
               if (xhr.readyState == 2) {
                   if (xhr.status == 200) {
                       xhr.responseType = "blob";
                   } else {
                       xhr.responseType = "text";
                   }
               }
           };
           return xhr;
       }
    })
    .complete(function ( xhr ) {
        let blob = new Blob(xhr.response);
        console.log(blob);
        var $a = $( '<a />' ),
            base_url = window.URL || window.webkitURL,
            url = base_url.createObjectURL( blob );
        $a.attr({
            'href' : url,
            'download' : 'document_name',
            "target": "_blank"
        });
       $("body").append($a);
       $a.click();
});

Response from API: