How to render an entity that has same type of primitives

I want to add an entity that has same name primitives is this possible with entity API?
What I want is something like this:

 entities.add({
    position: Cesium.Cartesian3.fromDegrees(-106.0, 45.0, 200000),
    box: {
      dimensions: new Cesium.Cartesian3(90000.0, 90000.0, 90000.0),
      material: Cesium.Color.fromRandom({ alpha: 1.0 }),
    },
    box: {
      dimensions: new Cesium.Cartesian3(9000.0, 9000.0, 9000.0),
      material: Cesium.Color.fromRandom({ alpha: 1.0 }),
    },
  }

Hi there,

Yes, you would add a second entity:

entities.add({
    position: Cesium.Cartesian3.fromDegrees(-106.0, 45.0, 200000),
    box: {
      dimensions: new Cesium.Cartesian3(90000.0, 90000.0, 90000.0),
      material: Cesium.Color.fromRandom({ alpha: 1.0 }),
    },
  });
entities.add({
    position: Cesium.Cartesian3.fromDegrees(-106.0, 45.0, 200000),
    box: {
      dimensions: new Cesium.Cartesian3(9000.0, 9000.0, 9000.0),
      material: Cesium.Color.fromRandom({ alpha: 1.0 }),
    },
  }