Dynamic json fields printing in Go

main.go

package main

import (
	"encoding/json"
	"fmt"
	"os"
)



func main() {
	
	jsonString :=  `
	{
		"properties": {
			"MessageId": "ididid",
			"MessageType": "message",
			"some_var": 1
		} 
	}
	`
	
	var dynamic map[string]interface{}

	err := json.Unmarshal([]byte(jsonString), &dynamic)
	if err != nil {
		fmt.Println("Error: ", err)
		os.Exit(1)
	}
	printMap(dynamic)


}	

func printMap(m map[string]interface{}) {
	for k, v := range m {
		fmt.Println("Key: ", k)
		switch v.(type) {
		case string:
			fmt.Println("Value is a string ", v.(string))
		case int:
			fmt.Println("Value is an int ", v.(int))
		case map[string]interface{}:
			printMap(v.(map[string]interface{}))
		}
	}
}