/usr/lib/x86_64-linux-gnu/libbambamc.so.0 is in libbambamc0 0.0.50-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libbambamc.so.0.0.50
/usr/lib/x86_64-linux-gnu/libbambamc.so.0.0.50