In what format should the st.target parameter be passed?

Question

Classmates

Good afternoon!
I'm trying to open the notification widget (WidgetSuggest) using the following URL:
http://connect.ok.ru/dk?st.cmd=WidgetSuggest&st.ap...
I'm getting a "grey screen".
If you remove the square brackets from st.target , the widget opens, but only one user is selected.
Can you please tell me how to correctly pass the list of id to the widget?

Answer 1

As a string separated by commas

st.target=123235234,253235t2153,2541435,451454