The example is in register-entity.json
is taken from Oasis Core Registry's
Test Vectors.
cd $(mktemp -d)
git clone https://github.com/tjanez/registry-test-vectors-test.git
cd registry-test-vectors-test/
go run main.go
Entity: <Entity id=3wNS/vFr/qqy6oAqgBzesWUMhZB7C8DnCED4T/NKy6M=>
SUCCESS: Entity descriptor signature matches!