How to model a Go struct after a JSON that has object values with arbitrary keys?

I am making an http request to an API from my go program. The request body is a JSON object as below:

 {
      "data": {
          "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX": { 
              "status": "ok","message":"aaa","details":"bbb"
          },
          "ZZZZZZZZ-ZZZZ-ZZZZ-ZZZZ-ZZZZZZZZZZZZ": { 
              "status": "ok","message":"ccc","details":"ddd" 
          }  
     }
}

Where "XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX" is an arbitrary key itself.

How to define a struct that allows that part to take a string value? Below is my struct, which I know does not allow me to properly decode the JSON:

type ReceiptResult struct {
	Data   ReceiptIDS    `json:"data"`
}

type ReceiptIDS struct {
	ReceiptID struct {
		Status  string `json:"status,omitempty"`
		Message string `json:"message,omitempty"`
		Details string `json:"details,omitempty"`
	}
}

I see the problem here your struct's struct is unneeded.

Structs should look like this

type ReceiptResult struct {
	Data map[string]ReceiptIDS `json:"data"`
}

type ReceiptIDS struct {
	Status  string `json:"status,omitempty"`
	Message string `json:"message,omitempty"`
	Details string `json:"details,omitempty"`
}

Playground working example: https://play.golang.org/p/EbJ2FhQOLz1