I believe that all questions arising from the 'Unbalanced brackets' error should be closed as dupe of either:
How can I make sure to set the brackets in my data tag correctly?
'Unbalanced Curly Brackets' Error with this command block code, what am I doing wrong?
Both of these questions have quality answers which guide the asker to their answer by ...
"Community Wiki" just means that that answer is not attributed to any one author, and thus can be expanded on by anyone. It also doesn't award reputation to anyone. There is not actually a wiki on the Arqade site.
Done! - I've removed the Community Wiki status from the two listed answers for you.
For future scenarios, here's some help center guidance for when posts should be considered for Community Wiki status:
When should I make my answers Community Wiki?
When you want to enhance the "wiki" aspect of your post, so that it can be a continually evolving ...