Getting URL encoded response.request.body in NodeJS?

I am using the request module in NodeJS to make an API call.

The request options are like this:

reqOpts: {
    form: {
        client_id: 'someID'
        client_secret: 'someValue'
        grant_type: 'someValue'
        refresh_token: 'dumm//yrefresh'
    },
    method: 'POST',
    url: 'someUri.com'
}

For the above request options, the response has a field, response.request.body which looks like this:

'refresh_token=dumm%2F%2Fyrefresh&grant_type=someValue&client_id=someID&client_secret=someValue'

Here you can see that refresh_token field was URL encoded in response i.e // got changes to %2F%2F. Is there a way to pass some parameters so that the response.request.body doesn’t encode the string and returns // intact as in the request?