Share LinkedIn JS API Link

I am trying to figure out if it is possible to pass more than a shared URL when using the associated js api.

My code is:

IN.UI.Share().params({
    url: 'http://www.example.com'
}).place.();

Now I tried to pass other parameters, for example:

IN.UI.Share().params({
    url: 'http://www.example.com',
    title: 'A Title',
    summary: 'A Small summary'
}).place.();

But it worked. They seem to just ignore these extra options.

I know I can do this with a custom sharing function:

http://www.linkedin.com/shareArticle?mini=true&url={articleUrl}&title={articleTitle}&summary={articleSummary}&source={articleSource}

But I want to use js api so that I can return the token to check if it is published correctly. Using the shareArticle method, it takes about 20-30 seconds to check if it was publicly available using this: ( https://developer.linkedin.com/retrieving-share-counts-custom-buttons ).