CHANNEL_MESSAGE_STICKER_SEPARATED

%1$@|posted a %2$@ sticker
the text before | is a header, the text after | is shown on a new line
26
Applied
%1$@|publicó un %2$@sticker
27/26
Classy Beaver, Dec 27, 2018 at 16:35
Applied
%1$@|publicó un %2$@ sticker
28/26
Classy Beaver, Dec 28, 2018 at 09:16