DKIM on DirectAdmin control panel

I have my own linux box where I'm hosting my mail server.  I've entered the DomainKey DKIM record as specified, but it doesn't seem to like it.  I've tried a few different combinations, like including the TXT record in double-quotes, adding a v=DKIM1 attribute, but can't seem to figure it out.

Anyone have experience with setting up a DKIM record in DirectAdmin?

Thanks,
---John

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