{
    "$schema": "http://json-schema.org/draft-04/schema#",
    "definitions": {
        "ImageUri": {
            "anyOf": [
                {
                    "description": "An image representative of the entity. In Blockcerts this is typically a data URI (https://en.wikipedia.org/wiki/Data_URI_scheme) embedded as a base-64 encoded PNG image, but it may also be a URI where the image may be found.",
                    "pattern": "data:image/png;base64,",
                    "type": "string"
                },
                {
                    "_format": "uri",
                    "description": "IRI (typically HTTP) representing this signature image.",
                    "type": "string"
                }
            ]
        }
    },
    "description": "An extension that allows issuers to add signature lines to the visual representation of the badge. This is not part of the cryptographic proof; it is for display purposes only.",
    "properties": {
        "image": {
            "$ref": "#/definitions/ImageUri"
        },
        "jobTitle": {
            "description": "Job title of signer, http://schema.org/jobTitle",
            "type": "string"
        },
        "name": {
            "description": "Full name of signer, http://schema.org/name",
            "type": "string"
        }
    },
    "required": [
        "image"
    ],
    "title": "SignatureLine schema",
    "type": "object"
}