type ts struct {
		Value map[int]string
	}

	instanceMap := map[string]interface{}{"value": map[int]interface{}{1: 12, 2: 122}}
	instanceByte, err := bson.Marshal(instanceMap)
	require.NoError(t, err)

	fmt.Println(fmt.Sprintf("%v", instanceByte))
	var newInstance ts
	err = bson.Unmarshal(instanceByte, &newInstance)
	require.NoError(t, err)