/usr/lib/x86_64-linux-gnu/libgnuradio-rds.so is in gr-rds 3.7.0.1.07cf86a-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgnuradio-rds.so.3.7.0
/usr/lib/x86_64-linux-gnu/libgnuradio-rds.so.3.7.0