A semi alternative solution is to do
(->> data
(map :title)
(map :_content))
This take advances of the fact that keywords are functions and the so called thread last macro. What it does is injecting the result of the first expression in as the last argument of the second etc..
The above code gets converted to
(map :_content (map :title data))
Clearly not as readable, and not easy to expand later either.
PS I asume something went wrong when the data was pasted to the web, because:
{: _content AlbumTitel2}
Is not Clojure syntax, this however is:
{:_content "AlbumTitel2"}
No the whitespace after :, and "" around text. Just in case you might want to paste some Clojure some other time.