Document

{
    "id": "FID001",
    "type": "Document",
    "attributes": {
        "createdAt": "string",
        "title": "string",
        "contentType": "certificate",
        "targetType": "Exam",
        "targetId": "string",
        "key": "string",
        "url": "string"
    },
    "relationships": {}
}