Apparently the Linked Data Signatures 1.0 is updated form the GraphSignature2012.
{ "@context": "http://json-ld.org/contexts/person.jsonld", "@id": "http://dbpedia.org/resource/John_Lennon", "name": "John Lennon", "born": "1940-10-09", "spouse": "http://dbpedia.org/resource/Cynthia_Lennon" "signature": { "type": "LinkedDataSignature2015", "creator": "http://example.com/i/pat/keys/5", "created": "2011-09-23T20:21:34Z", "domain": "example.org", "nonce": "2bbgh3dgjg2302d-d2b3gi423d42", "signatureValue": "OGQzNGVkMzVm4NTIyZTkZDYMmMzQzNmExMgoYzI43Q3ODIyOWM32NjI=" } }