Add "Meta Description" using Blogger API v3

Hi,
I’m trying to publish posts into my blog using Blogger API v3 and all is 
working fine, except the “Meta Description” (also known as “Search 
Description”). Using default Blogger editor I can add the meta description 
to every post or page, but I cannot do this using the Blogger API v3. 
Please note that I already have been enabled this option in:
*Settings » Search preferences » Meta tags » Description*

At this moment, my JavaScript code looks like this:
var article = {

title : 'Hello World',
url : 'hello-world',
content : 'This is a "Hello World" article',
labels : ['Hello', 'World']

};

gapi.client.blogger.posts.insert({

blogId : '0123456789',
resource : article

}).execute(function (response) {

console.log(response);

});

The code above publishes the specified article into my blog but without 
meta description. Also I tried to use article.metaDescription and 
article.customMetaData — but without any success. Also, I noticed that 
method gapi.client.blogger.posts.get don’t return the meta description for 
specified post.

Can anyone help me or tell me what I’m doing wrong?
Thank you!

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