I Got A 60 Day Notice To Vacate Out Of The Blue..i Live In Georgia

Today I got a notice to vacate my apartment within 60 days. The notice did not list a date or reason as to why.
I'm not behind on rent, I haven't violated my lease or caused any issues with neighbors. I live alone and keep to myself. I can't think of a single reason that I would be given notice to vacate.
I live in a large house that was renovated into 3 separate apartments. As far as I know, I am the only person to get this notice.
My lease isn't technically up until December, but the notice, sent via email, says that the owners do not wish to renew my lease. When I called the property management company, they claimed not to have any information on why I am being given this notice, and that the lady who conducts evictions and notices to vacate was out of the office.
Now I'm sitting here, listening to my neighbors with numerous lease violations, in the other apartment fighting like cats and dogs, and wondering why I, the model tenant, is being put out.
However....I do suspect the place has been sold. It wouldn't be the first time they've sold the property. A few months ago, I got a note on my door from my city's property appraisal department that was meant for the property owner.
What do you guys suspect is at play here and what are my rights? I plan to leave without fuss, but I'm so confused and hurt.
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