Database
[{"_id":"id1","artistName":"Artist Name","recordLabel":"Label Name","genre":"Genre","albums":[{"albumName":"Album 1","songs":["Song 1","Song 2"]},{"albumName":"Album 2","songs":["Song 3","Song 4"]},]}]
Query
db.collection.update({"albums.songs":"Song 2"},{$set:{"albums.$.songs.$[song]":"Tested"}},{arrayFilters:[{song:"Song 2"}]})