Edit 
				
					{
    "method": "hub.item.dictionary.value.add",
    "id": "<request_id>",
    "params": {
        "_id" : "5cf0dc8c7f000068d223e88a",
        "element": {
            "type": "string",
            "value": "some_string_value"
        }
    }
}
Edit 
				
					{
    "api": "1.0",
    "error": null,
    "id": "_ID_",
    "result": {}
}