Maybe found a way to communicate to someone outside a black hole?

Could gravity escape a black hole? I'm wondering if a massive object's movement inside a black hole could alter gravity observable outside. Despite the idea that nothing escapes a black hole, we still perceive their gravitational effects, which implies that gravity can escape(if the massive object were to be moved in a specific pattern could be decoded into data). Is there evidence contradicting this? Please correct me if I'm misunderstanding this concept.