How to move "layout-region-node-secondary" to bottom of form?

Currently i’m trying to move this block from side to bottom of add content form and i’m wondering how to achieve it. I’ve tried with custom sub-theme but seems like i’m not good with them and this way i was unable to do this. Anyone knows how to do this? “layout-region-node-secondary” is a block on right from form where you can define authoring information, promotion methods, etc.

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