JSON from nested map

nested.go

package main

import (
	"encoding/json"
	"fmt"
)

func main() {
	var data = map[string]map[string]string{
		"public_key":        map[string]string{},
		"custom_properties": map[string]string{},
	}

	data["public_key"]["name"] = "x"
	data["custom_properties"]["key1"] = "value1"
	data["custom_properties"]["key2"] = "value2"

	js, _ := json.MarshalIndent(data, " ", "    ")

	fmt.Println(string(js))
}

/* 
{
     "custom_properties": {
         "key1": "value1",
         "key2": "value2"
     },
     "public_key": {
         "name": "x"
     }
 }
*/