How to parse this PayPal JSON response with AnyHas

I'm using PaypalSDK to add paypal payment methods to the app I'm developing, it's already working and when the payment is succesful I'm getting a response which I'm converting into a jsonObject but I don't know how to parse it in order to extract just the code from the response. This is the response I'm getting

JSON: [AnyHashable("response"): {
code = "******************* -****************-**********************";
}, AnyHashable("response_type"): authorization_code, AnyHashable("client"): {
environment = sandbox;
"paypal_sdk_version" = "2.11.5";
platform = iOS;
"product_name" = "PayPal iOS SDK";
}]

And this is what I have on my payPalFuturePaymentViewController method:

  func payPalFuturePaymentViewController(_ futurePaymentViewController: PayPalFuturePaymentViewController, didAuthorizeFuturePayment futurePaymentAuthorization: [AnyHashable: Any]) {
    print("PayPal Future Payment Authorization Success!")
    self.resultText = futurePaymentAuthorization.description
    let jsonObject = JSON(futurePaymentAuthorization.description)
    print("JSON: \(jsonObject)")
    // send authorization to your server to get refresh token.
    futurePaymentViewController.dismiss(animated: true, completion: { () -> Void in

        var paypalPago = PagoItem(noTarjeta: "", fechaExp: "", cvc: "", token: "", tipo: "PayPal")

        self.metodosPago.append(paypalPago)
        self.saveMetodo()

        let destViewController : UIViewController = self.storyboard!.instantiateViewController(withIdentifier: "pagosLlenos")
        var vcArray = self.navigationController?.viewControllers

        vcArray?.removeLast()
        vcArray?.append(destViewController)
        self.navigationController?.setViewControllers(vcArray!, animated: true)
    })
}

So what I would like to do is to get the code from the response, put it in a variable and then include that variable in the paypalPago item:

 var paypalPago = PagoItem(noTarjeta: "", fechaExp: "", cvc: "", token: PayPalCode, tipo: "PayPal")

Any help on how to parse this json and extract the code I need would be much appreciated :)

Solved

It was very easy actually the problem was that I was storing the string description not the actual JSON response, so I had to change

let jsonObject = JSON(futurePaymentAuthorization.description)

let jsonObject = JSON(futurePaymentAuthorization)

Now my response looks like this:

JSON: {
"client" : {
"environment" : "sandbox",
"product_name" : "PayPal iOS SDK",
"paypal_sdk_version" : "2.11.5",
"platform" : "iOS"
  },
"response_type" : "authorization_code",
"response" : {
"code" : "****************_*********_***********************"
 }

And now I can parse it like any normal JSON

    let response = jsonObject["response"]["code"].string!
    print(response)

    // send authorization to your server to get refresh token.
    futurePaymentViewController.dismiss(animated: true, completion: { () -> Void in
        var paypalPago = PagoItem(noTarjeta: "", fechaExp: "", cvc: "", token: response, tipo: "PayPal")
    self.metodosPago.append(paypalPago)