{
  "@context": {
    "sec": "http://purl.org/security#",
    "xsd": "http://www.w3.org/2001/XMLSchema#",
    "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
    "dc": "http://purl.org/dc/terms/",
    "sec:signer": {"@type": "@id"},
    "dc:created": {"@type": "xsd:dateTime"}
  },
  "@id": "http://example.org/sig1",
  "@type": ["rdf:Graph", "sec:SignedGraph"],
  "dc:created": "2011-09-23T20:21:34Z",
  "sec:signer": "http://payswarm.example.com/i/john/keys/5",
  "sec:signatureValue": "OGQzNGVkMzVm4NTIyZTkZDYMmMzQzNmExMgoYzI43Q3ODIyOWM32NjI=",
  "@graph": {
    "@id": "http://example.org/fact1",
    "dc:title": "Hello World!"
  }
}