{
    "type": "object",
    "properties": {
        "attachment": {
            "type": "object",
            "properties": {
                "id": {
                    "type": "string",
                    "description": "Unique identifier for the uploaded attachment"
                },
                "filename": {
                    "type": "string",
                    "description": "Original filename of the uploaded file"
                },
                "url": {
                    "type": "string",
                    "description": "URL to access the uploaded file"
                },
                "downloadUrl": {
                    "type": "string",
                    "description": "Direct download URL for the file"
                },
                "mimeType": {
                    "type": "string",
                    "description": "MIME type of the uploaded file"
                },
                "size": {
                    "type": "integer",
                    "description": "File size in bytes"
                },
                "extension": {
                    "type": "string",
                    "description": "File extension"
                },
                "isImage": {
                    "type": "boolean",
                    "description": "Whether the file is an image"
                },
                "thumbnailUrl": {
                    "type": "string",
                    "description": "Thumbnail URL (for images/videos)"
                },
                "metadata": {
                    "type": "object",
                    "properties": {
                        "width": {
                            "type": "integer",
                            "description": "Image width in pixels (for images)"
                        },
                        "height": {
                            "type": "integer",
                            "description": "Image height in pixels (for images)"
                        },
                        "duration": {
                            "type": "number",
                            "description": "Duration in seconds (for audio/video)"
                        }
                    },
                    "description": "File metadata"
                },
                "uploadedBy": {
                    "type": "string",
                    "description": "User ID who uploaded the file"
                },
                "expiresAt": {
                    "type": "string",
                    "format": "date-time",
                    "description": "When the file access expires (if applicable)"
                },
                "uploadedAt": {
                    "type": "string",
                    "format": "date-time",
                    "description": "When the file was uploaded"
                }
            },
            "description": "Uploaded attachment details"
        },
        "success": {
            "type": "boolean",
            "description": "Whether the file was uploaded successfully"
        },
        "message": {
            "type": "string",
            "description": "Success or error message"
        }
    },
    "version": 1
}