I am implementing a gRPC API and wanted to add JSON body data as it is in response.

so I have tried:

```
type Message struct {
    Subject string `json:"subject"`
    Body    interface{}  `json:"body"`
}

```

proto3

```
message Message {
    string subject = 1;
    string body = 2;
}

```

API code:

```
    en, err := client.Request.Get(req.Name)
    if err != nil {
        return nil, status.Error(codes.InvalidArgument, err.Error())
    }

    data, _ := json.Marshal(en.Body)

    return &response.Message{
        Subject: en.Subject,
        Body:    string(data),
    }, nil

```

After adding this getting gRPC API response:

```
{
  "subject": "dev",
  "body": "{\"name\":\"environment\",\"description\":\"The default environment\"}",
}

```

The problem is body JSON key-value is dynamic.
Is there any way by which we can get response something like

```
{
  "subject": "dev",
  "body": {"name":"environment","description":"The default environment"},
}

```