Ok seems that i found answer myself, it was missing rating.value param, which for whatever reason needs to be set to "0" to add me_too rating to entity
Can you confirm if me too is enabled from Community Admin?
Community Admin > Features > Ratings.
And you are sending correct rating name, You can get all the rating name https://community.lithium.com/t5/Developer-Documentation/bd-p/dev-doc-portal?section=commv1&leaf-id=RatingSystem.key#RatingSystem.key
Yes it is enabled in admin > features > ratings
and I am sending correct key -> forum_topic_metoo
I can also successfully get a count of metoos on a forum topic, however call to add fails using in custom endpoint (freemarker) or simply by curl with authorization
Ok seems that i found answer myself, it was missing rating.value param, which for whatever reason needs to be set to "0" to add me_too rating to entity
