I have a website and url is altde.com. I have written some posts in this website. Url of one post is http://altde.com/check-2g-3g-internet-data-balance-in-airtel-prepaid/
I have added class="entry-title" in main headline.
<h1 class="entry-title title">Check 2G 3G internet data balance in airtel prepaid</h1>
But i can not see it in structure data testing tool. You can test it here https://developers.google.com/structured-data/testing-tool/?url=http://altde.com/check-2g-3g-internet-data-balance-in-airtel-prepaid/
Also in Google web master tools, structure data section is showing error that is entry-title missing.