{
    "type": "object",
    "properties": {
        "historyId": {
            "type": "string"
        },
        "id": {
            "type": "string"
        },
        "messages": {
            "type": "array",
            "items": {
                "type": "object",
                "properties": {
                    "ARC-Authentication-Results": {
                        "type": "string"
                    },
                    "ARC-Message-Signature": {
                        "type": "string"
                    },
                    "ARC-Seal": {
                        "type": "string"
                    },
                    "Authentication-Results": {
                        "type": "string"
                    },
                    "Content-Type": {
                        "type": "string"
                    },
                    "Date": {
                        "type": "string"
                    },
                    "Delivered-To": {
                        "type": "string"
                    },
                    "DKIM-Signature": {
                        "type": "string"
                    },
                    "From": {
                        "type": "string"
                    },
                    "historyId": {
                        "type": "string"
                    },
                    "id": {
                        "type": "string"
                    },
                    "internalDate": {
                        "type": "string"
                    },
                    "labels": {
                        "type": "array",
                        "items": {
                            "type": "object",
                            "properties": {
                                "id": {
                                    "type": "string"
                                },
                                "name": {
                                    "type": "string"
                                }
                            }
                        }
                    },
                    "payload": {
                        "type": "object",
                        "properties": {
                            "body": {
                                "type": "object",
                                "properties": {
                                    "data": {
                                        "type": "string"
                                    },
                                    "size": {
                                        "type": "integer"
                                    }
                                }
                            },
                            "filename": {
                                "type": "string"
                            },
                            "mimeType": {
                                "type": "string"
                            },
                            "partId": {
                                "type": "string"
                            }
                        }
                    },
                    "Received": {
                        "type": "string"
                    },
                    "Received-SPF": {
                        "type": "string"
                    },
                    "Return-Path": {
                        "type": "string"
                    },
                    "sizeEstimate": {
                        "type": "integer"
                    },
                    "snippet": {
                        "type": "string"
                    },
                    "Subject": {
                        "type": "string"
                    },
                    "threadId": {
                        "type": "string"
                    },
                    "To": {
                        "type": "string"
                    },
                    "X-Received": {
                        "type": "string"
                    }
                }
            }
        }
    },
    "version": 2
}