/usr/lib/trafficserver/libtsmgmt.so.3 is in trafficserver 3.2.4-1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/trafficserver/libtsmgmt.so.3.2.4
/usr/lib/trafficserver/libtsmgmt.so.3.2.4