{"endpoint_host": "3817aec1a217-private.s3.app.hostwolf.net:15998", "bucket": "uploads", "roundtrip_ok": true, "keys": ["app/probe.txt", "big/100m.bin", "hello.txt"], "presigned_host": "3817aec1a217-private.s3.app.hostwolf.net:15998"}