Submit form data in JQuery Ajax call

<form class="form" id="uploadDocuments" method="post"
      enctype="multipart/form-data">
    <div class="card-body">
        <div class="mb-15">
            <div class="form-group row">
                <label class="col-lg-2 col-form-label">Doc Type:</label>
                <div class="col-lg-4" style="top: 10px;">
                    <select id="docType" name="docType">
                        <option value="">-select-</option>
                        <option value="STORE_FRONT">STORE FRONT</option>
                        <option value="STORE_INSIDE">STORE INSIDE</option>
                        <option value="SELFIE">SELFIE</option>
                        <option value="GOOGLE_PHOTOS">GOOGLE PHOTOS</option>
                        <option value="QR_CODE">QR CODE</option>
                        <option value="OTHERS">OTHER</option>
                    </select>
                </div>
            </div>
            <div class="form-group row">
                <div class="col-lg-10" style="top: 10px;">
                    <input type="hidden" name="userId" th:value="${merchant.id}">
                    <input type="hidden" name="adminId"
                           th:value="${session.user}"><br><br>
                    <input name="file" type="file"/>
                </div>
            </div>
        </div>
    </div>
    <div class="card-footer">
        <button class="btn btn-primary mr-2">Submit</button>
    </div>
</form>

$("form#uploadDocuments").submit(function(e) {
        e.preventDefault();
        var formData = new FormData(this);

        $.ajax({
            type: 'POST',
            url: uploadDocumentsUrl,
            headers: {
                  "Authorization":authorizationToken,
              },
            data: formData,
            success: function (data) {
               alert('Document Uploaded successfully');
               window.location.reload();
            },
            error: function(xhr, textStatus, error){
                  var data=xhr.responseText;
                  var jsonResponse = JSON.parse(data);
                  console.log(jsonResponse.message);
                  alert('Message: ' +jsonResponse.message);
                  },
            cache: false,
            contentType: false,
            processData: false
        });
    });