/usr/lib/python2.7/dist-packages/mongoengine-0.6.13.egg-info/SOURCES.txt is in python-mongoengine 0.6.13-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/mongoengine-0.6.13.egg-info/../../../../share/pyshared/mongoengine-0.6.13.egg-info/SOURCES.txt