How to solve PayPalException error: (400) Bad Request.

Question

I am currently testing credit card payments using the PayPal payments Rest API.

 

I keep getting the following error:

 

PayPalException Execute: The remote server returned an error: (400) Bad Request.

 

My Card details

//Address for the payment
Address billingAddress = new Address();
billingAddress.city = "Johnstown";
billingAddress.country_code = "US";
billingAddress.line1 = "52 N Main ST";
billingAddress.postal_code = "43210";
billingAddress.state = "OH";
//Now Create an object of credit card and add above details to it
CreditCard crdtCard = new CreditCard();
crdtCard.billing_address = billingAddress;
crdtCard.cvv2 = "819";
crdtCard.expire_month = 10;
crdtCard.expire_year = 2019;
crdtCard.first_name = "pankaj";
crdtCard.last_name = "Kumar";
crdtCard.number = "4885699625443750";
crdtCard.type = "visa";