PayPal Express Checkout: Setting logo_image and name using REST API

PayPal's Express Checkout documentation says that you can customize the checkout using the Experience API. And when you go to the Experience API documentation, you see the ability to set a custom name, logo_image, and more.

In our implementation, hiding the shipping fields (no_shipping: 1) works - and that uses the Experience API - but setting the name and logo_image does not.

Code below. Does anyone know if there's a way to set name and/or logo_image?

payment: function(data, actions) {
         return actions.payment.create({
            payment: {
                transactions: [
                    {
                        amount: { total: '9.99', currency: 'USD' }
                    }
                ]
            },

            experience: {
                name: 'Custom Name',
                presentation: {
                    logo_image: 'https://i.imgur.com/customimage.png'
                },
                input_fields: {
                    no_shipping: 1
                }
            }
        });
    },