$_json_parse.go

package main

import (
	"encoding/json"
	"fmt"
)

type Hoge struct {
	$   string
}

func main() {
	var jsonStr = `{
		"$": "hoge",
	}`

	var h Hoge
	err := json.Unmarshal([]byte(jsonStr), &h)
	if err != nil {
		panic(err)
	}

	fmt.Println(h)
}