package main

import "encoding/json"
import "fmt"
import "os"

type Response1 struct {
  Device string
  Type string
  Data map[string]interface{}
}

func main() {
  str := `{"Device": "host", "Type": "request", "Data": {"total": 120, "payment": 200, "order_sub": [{"seq": 1, "name": "Capuchino"}]}}`
  response := Response1{}
  json.Unmarshal([]byte(str), &response)
  fmt.Println(response.Data)

  enc := json.NewEncoder(os.Stdout)
  enc.Encode(response.Data)
}