POST https://api.ebay.com/post-order/v2/casemanagement/5********3/provide_return_address { "firstName": "e***********1", "returnAddress": { "addressLine1": "2******************e", "addressType": "BUSINESS", "city": "San Jose", "country": "US", "postalCode": "9***5", "stateOrProvince": "California" } }