Java integration
curl \ -H "Authorization: $API_KEY" \ http://catalog.marketplace.us-east-1.amazonaws.com/GetResourcePolicy#resourceArn
curl \ -H "Authorization: $API_KEY" \ http://catalog.marketplace.us-east-1.amazonaws.com/DescribeEntity#catalog&entityId
curl \ -H "Authorization: $API_KEY" \ http://catalog.marketplace.us-east-1.amazonaws.com/DescribeChangeSet#catalog&changeSetId