ctx.ReadBody cant't get map type POST value

[hiscaler]

Post data

{
    "platform": "tt",
    "status": 1,
    "configuration": {
        "a": "aaaa"
    }
}

type editThirdPartyAccountRequest struct {
	Platform      string            `json:"platform" form:"platform"`
	Configuration map[string]string `json:"configuration" form:"configuration"`
	Status        int8              `json:"status" form:"status"`
}

// Controller
var editRequest editThirdPartyAccountRequest

if err = ctx.ReadBody(&editRequest); err != nil {
    fmt.Println(fmt.Sprintf("feeeeee %#v", editRequest))
    return
}

ReadJson also no effect with configuration value

[hiscaler]

It's my test tools question, ok now.