Installation repo key

trying to install nexus-repository-manager via yum/apt ( from ), however imported key ( Sonatype Nexus Repository ) doesn’t match the repository. I also tried to convert it to gpg but doesn’t help.

Is the installation from repository supported?
I wanted to try sonatype-hosted repo, however there is only nexus-iq-cli, not nexus-repository-manager.
It works when I don’t validate repo key, however I can’t go this way for customer.

I tried manual way from tar.gz archive, however this is much more easy. Also it is easy for update.