NFS permission problems

I’m having problem with Docker and Plex and permissions to read the shared folders. seems that I need permission 777 for Docker/Plex to work and play the media. I would like to have 744 permissions and still have Plex able to read and play the media.

Does anyone have any idea what the problem might be?
I have one server with Docker/plex and another with Samba who’s sharing everything to the network. So I would like to have 744 on the Samba for the folders and Docker/Plex still be able to work.

do I need to add user/group somehow or what?
On both servers I have the same username and password.

Best regards