访问必要的字段json golang

I've been trying to access field from third party api. For example the json response from third party api is like this:

{
    "request_id": "bba3b69370774f87bed0e70398a97f45",
    "account_id": "2c1cd618",
    "number": "6289523686433"
}

I want to get request_id only can I create interface only like this:

type Response struct {
   RequestID string json:"request_id"
}

and then do this:

var resp Response
json.Unmarshal(body,&resp)

Is it possible to do this? Or do I need to make all field of response body in Response struct to be able to unmarshall? Thanks

From the json.Unmarshal docs

By default, object keys which don't have a corresponding struct field are ignored (see Decoder.DisallowUnknownFields for an alternative).

Here is a runnable example, showing it working as expected