How to add "properties" to products through the VKontakte API?

Question

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Using PHP and the market.add method, I add a product from my site to VKontakte "products".
The product is added, but I have to manually enter the properties (in this case, "Size") through the store settings.

How do I add these properties when adding a product via PHP?

Answer 1

Now there is no such possibility in the VK API.