{
    "additionalProperties": true,
    "properties": {
        "asm_group_id": {
            "maximum": 32767,
            "minimum": 0,
            "type": "integer"
        },
        "category": {
            "items": {
                "type": "string"
            },
            "type": [
                "array",
                "string"
            ]
        },
        "email": {
            "type": "string"
        },
        "ip": {
            "_format": "ipv4",
            "type": "string"
        },
        "newsletter": {
            "additionalProperties": true,
            "properties": {
                "newsletter_id": {
                    "type": "string"
                },
                "newsletter_send_id": {
                    "type": "string"
                },
                "newsletter_user_list_id": {
                    "type": "string"
                }
            },
            "type": "object"
        },
        "sg_event_id": {
            "type": "string"
        },
        "sg_message_id": {
            "type": "string"
        },
        "smtp-id": {
            "type": "string"
        },
        "timestamp": {
            "_format": "date-time",
            "type": "string"
        },
        "useragent": {
            "type": "string"
        }
    },
    "self": {
        "format": "jsonschema",
        "name": "open",
        "vendor": "com.sendgrid",
        "version": "1-0-0"
    },
    "type": "object"
}