{
  "@context": {
    "@version": 1.1,
    "@protected": true,
    "challenge": "https://w3id.org/security#challenge",
    "created": {
      "@id": "http://purl.org/dc/terms/created",
      "@type": "http://www.w3.org/2001/XMLSchema#dateTime"
    },
    "domain": "https://w3id.org/security#domain",
    "expires": {
      "@id": "https://w3id.org/security#expiration",
      "@type": "http://www.w3.org/2001/XMLSchema#dateTime"
    },
    "jws": "https://w3id.org/security#jws",
    "nonce": "https://w3id.org/security#nonce",
    "proofPurpose": {
      "@id": "https://w3id.org/security#proofPurpose",
      "@type": "@vocab",
      "@context": {
        "@protected": true,

        "id": "@id",
        "type": "@type",

        "assertionMethod": {
          "@id": "https://w3id.org/security#assertionMethod",
          "@type": "@id",
          "@container": "@set"
        },
        "authentication": {
          "@id": "https://w3id.org/security#authenticationMethod",
          "@type": "@id",
          "@container": "@set"
        }
      }
    },
    "proofValue": "https://w3id.org/security#proofValue",
    "verificationMethod": {
      "@id": "https://w3id.org/security#verificationMethod",
      "@type": "@id"
    }
  }
}