BotFramework Adaptive Cards - Container Actions are not Rendered

How can I add actions for containers? According to the documentation Container type has an "actions" object, but when testing the card it in the adaptive cards visualizer or in the bot-framework emulator no button is displayed. Attached an example for the kind of card I'm trying to generate.

Thanks for your help.

{
    "type": "AdaptiveCard",
    "body": [
    {

        "style":"normal",
        "type": "Container",
        "separation" : "strong",
        "actions": [
            {
              "type": "Action.OpenUrl",
              "url": "http://foo.bar.com",
              "title": "adaptivecards1"
            }
            ],
        "items": [
            {
                "type": "ColumnSet",
                "separation": "strong",
                "columns": [
                    {
                        "type": "Column",
                        "size":1,
                        "items": [
                            {
                                "type": "TextBlock",
                                "text": "Title",
                                "size": "large",
                                "isSubtle": true
                            },
                            {
                                "type": "TextBlock",
                                "text": "Model: ABC",
                                "size": "small"
                            }
                        ]
                    },
                    {
                        "type": "Column",
                        "size": "1",
                        "items": [
                            {
                                "type": "TextBlock",
                                "text": " "
                            },
                            {
                                "type": "Image",
                                "url": "https://path/to/image.jpg",
                                "size": "large",
                                "horizontalAlignment" :"right"
                            }
                        ]
                    }
                ]
            }
        ]
    },
    {

        "style":"normal",
        "type": "Container",
        "separation" : "strong",
        "actions": [
            {
              "type": "Action. OpenUrl",
              "url": "http://foo.bar.com",
              "title": "adaptivecards2"
            }
            ],
        "items": [
            {
                "type": "ColumnSet",
                "separation": "strong",
                "columns": [
                    {
                        "type": "Column",
                        "size":1,
                        "items": [
                            {
                                "type": "TextBlock",
                                "text": "Another Title",
                                "size": "large",
                                "isSubtle": true
                            },
                            {
                                "type": "TextBlock",
                                "text": "Model: XYZ",
                                "size": "small"
                            }                           ]
                    },
                    {
                        "type": "Column",
                        "size": "1",
                        "items": [
                            {
                                "type": "TextBlock",
                                "text": " "
                            },
                            {
                                "type": "Image",
                                "url": "https://path/to/other/image.jpg",
                                "size": "large",
                                "horizontalAlignment" :"right"
                            }
                        ]
                    }
                ]
            }
        ]
    }
]}