Why wall method.createComment do not pull the data of the website?

Good day! through the wall.createComment add comments to post. This is a link to the ad on the website. Through API in the message parameter indicates a link and it is displayed as a link but not pulled up the website and the picture. When just using the website add a link to it to pull and image ads and beautiful everything turns out. How to do via api? Links to Cyrillic. Thank you.

$url = "https://api.vk.com/method/wall.createComment?owner_id=-" . $this->group_id
. "&post_id=" . $this->post_id
. "&message=" . $ads->getBoardMessageSoc()
. "&access_token=" . $this->_access_token;

$ads->getBoardMessageSoc() - returns a reference type https://xn--l1ak.xn--p1ai/%D0%9E%D1%80%D0%B5%D0%BD...

And again. I was asked this question in the support api vk. Here is what they replied:
Hello, Alexander!

Sorry for the long wait.

I'm afraid that using this method to make a link with a snippet will not work.

Team VK.

What method to use?
June 10th 19 at 15:04
1 answer
June 10th 19 at 15:06
Through the API you can make, you can make a request to https://vk.com//share.php?act=url_attachment putting parameters: url and index (after login)

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