title: Is it possible to add specific "mainEntityOfPage"
body: <p>I'm updating microdata on my website and the agency asked me to provide microdata for blog articles. Everything is pretty clear except &quot;mainEntityOfPage&quot;:</p>
  <p>I found on schema.org that &quot;mainEntityOfPage&quot; can be implemented in this way:</p>
  <pre><code>&lt;div itemScope itemType=&quot;https://schema.org/BlogPosting&quot;&gt;
    ...
    &lt;link itemProp=&quot;mainEntityOfPage&quot; href=&quot;example.com&quot; /&gt;
  &lt;/div&gt;
  </code></pre>
  <p>So in the .json format it looks next:</p>
  <pre><code>{
    &quot;@context&quot;: &quot;https://schema.org&quot;,
    &quot;@type&quot;: &quot;BlogPosting&quot;,
    &quot;mainEntityOfPage&quot;: &quot;example.com&quot;,
    ...
  }
  </code></pre>
  <p>But the agency asked me to provide &quot;mainEntityOfPage&quot; so .json format looks like:</p>
  <pre><code>{
    &quot;@context&quot;: &quot;https://schema.org&quot;,
    &quot;@type&quot;: &quot;BlogPosting&quot;,
    &quot;mainEntityOfPage&quot;: {
      &quot;@type&quot;: &quot;WebPage&quot;,
      &quot;@id&quot;: &quot;example.com&quot;
    },
  }
  </code></pre>
  <p>Is it possible to provide such microdata because I haven't found anything that looks like this?</p>