neta.json

{
    "type": "AdaptiveCard",
    "body": [
        {
            "type": "TextBlock",
            "size": "Medium",
            "weight": "Bolder",
            "text": "${title}"
        },
        {
            "type": "ColumnSet",
            "columns": [
                {
                    "type": "Column",
                    "items": [
                        {
                            "type": "Image",
                            "style": "Person",
                            "url": "${creator.profileImage}",
                            "size": "Small"
                        }
                    ],
                    "width": "auto"
                },
                {
                    "type": "Column",
                    "items": [
                        {
                            "type": "TextBlock",
                            "weight": "Bolder",
                            "text": "${creator.name}",
                            "wrap": true
                        },
                        {
                            "type": "TextBlock",
                            "spacing": "None",
                            "text": "Created {{DATE(${createdUtc},SHORT)}}",
                            "isSubtle": true,
                            "wrap": true
                        }
                    ],
                    "width": "stretch"
                }
            ]
        },
        {
            "type": "TextBlock",
            "text": "${description}",
            "wrap": true
        },
        {
            "type": "FactSet",
            "facts": [
                {
                    "$data": "${properties}",
                    "title": "${key}:",
                    "value": "${value}"
                }
            ]
        }
    ],
    "actions": [
        {
            "type": "Action.ShowCard",
            "title": "Set due date",
            "card": {
                "type": "AdaptiveCard",
                "body": [
                    {
                        "type": "Input.Date",
                        "id": "dueDate"
                    },
                    {
                        "type": "Input.Text",
                        "id": "comment",
                        "placeholder": "Add a comment",
                        "isMultiline": true
                    }
                ],
                "actions": [
                    {
                        "type": "Action.Submit",
                        "title": "OK"
                    }
                ],
                "$schema": "http://adaptivecards.io/schemas/adaptive-card.json"
            }
        },
        {
            "type": "Action.OpenUrl",
            "title": "View",
            "url": "${viewUrl}"
        }
    ],
    "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
    "version": "1.3"
}

neta.xml

<AdaptiveCard xmlns="http://adaptivecards.io/schemas/adaptive-card.json">
  <TextBlock size="Medium" weihght="Bolder" text="${title}" />
  <ColumnSet>
    <Column width="auto">
      <Image style="Person" url="${creator.profileImage}" size="small" />
    </Column>
    <Column width="stretch">
      <TextBlock weight="border" text="${creator.name}" wrap="true" />
      <TextBlock spacing="None" text="Created {{DATE(${createdUtc}, SHORT)}}" isSubtle="true" wrap="true" />
    </Column>
  </ColumnSet>
  <TextBlock text="${description}" wrap="true" />
  <FactSet data="${properties}">
    <Fact title="${key}" value="${value}" />
  </FactSet>
  <Actions>
    <Action.ShowCard title="Set due date">
      <AdaptiveCard>
        <Input.Date id="dueDate" />
        <Input.Text id="comment" placeholder="Add a comment" isMultiline="true" /> 
        <Actions>
          <Action.Submit title="OK" />
        </Actions>
      </AdaptiveCard>
    </Action.ShowCard>
    <Action.OpenUrl title="View" url="${viewUrl}" />
  </Actions>
</AdaptiveCard>