{
    "blockType": "when",
    "blockOptions": {
        "method": {
            "name": "stringOperation",
            "args": {
                "item": "item",
                "operation": "operation",
                "value": "value"
            }
        }
    },
    "fields": [
        {
            "name": "item",
            "type": "item",
            "value": "5de64f6a70c7be0541cc0853"
        },
        {
            "name": "operation",
            "type": "string",
            "value": "contain"
        },
        {
            "name": "value",
            "type": "string",
            "value": "operateOnThis"
        }
    ]
}