Hello. I need help with this, I'm selling digital and I don't need the buyer's address. However, everytime I try to check out I receive this message:

[UNPROCESSABLE_ENTITY] The requested action could not be performed, semantically incorrect, or failed business validation. https://developer.paypal.com/docs/api/orders/v2/#error-MISSING_SHIPPING_ADDRESS

I need to change shipping_preference: 'SET_PROVIDED_ADDRESS' to NO_ADDRESS 

How can I edit the shipping_preference? Thank you