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¿Cómo puedo verificar si hay una variable en el objeto json?

Estoy tratando de verificar si hay un ID de gremio en mi objeto JSON. Tengo todas las cosas analizadas y hechas, pero simplemente no sé cómo verificarlas.

 { "893782530879258635": { } }

Salida esperada: Verdadero

 { }

Salida esperada: Falso

about 4 years ago · Juan Pablo Isaza
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