public class RxSample : MonoBehaviour
{
    class SampleResponse
    {
        public int value1;
        public int value2;
    }

    class SampleData
    {
        public readonly IntReactiveProperty Value1 = new IntReactiveProperty();
        public readonly IntReactiveProperty Value2 = new IntReactiveProperty();

        public SampleData(SampleResponse response)
        {
            UpdateData(response);
        }

        public void UpdateData(SampleResponse response)
        {
            Value1.Value = response.value1;
            Value2.Value = response.value2;
        }
    }

    [SerializeField]　Text Value1Text;
    [SerializeField]　Text Value2Text;
    [SerializeField]　Button ReloadButton;

    SampleData _sample;

    void Start()
    {
        if (_sample == null)
        {
            _sample = new SampleData(new SampleResponse() {value1 = 10, value2 = 20});
        }

        _sample.Value1.SubscribeToText(Value1Text).AddTo(this);
        _sample.Value2.SubscribeToText(Value2Text).AddTo(this);

        //データ更新があったら
        ReloadButton.OnClickAsObservable()
            .Subscribe(_ => _sample.UpdateData(new SampleResponse() {value1 = 1000, value2 = 2000}))
            .AddTo(this);
    }
}