Headers:X-EBAY-API-CALL-NAME : AddItem,"X-EBAY-API-SITEID":
"0","X-EBAY-API-COMPATIBILITY-LEVEL": "1303","X-EBAY-API-APP-NAME":
settings.EBAY_CLIENT_ID,"X-EBAY-API-DEV-NAME":
settings.EBAY_DEV_ID,"X-EBAY-API-CERT-NAME":
settings.EBAY_SECRET_IDPayload...