{"algorithm":"Ed25519","public_key":"PtG6GAd4pvQ35cJV5uSl8DsK3fEluJQzCikW144fcgQ=","signature":"ed25519: then base64url without padding, over the card's canonical JSON","canonical_json":"every field but \"signature\", keys sorted at every level, no whitespace, UTF-8 text rather than \\u escapes, and whole-number floats up to 2**53 written as integers (0.0 as 0)","test_mode":false}