{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "children": [
    {
      "elmType": "span",
      "style": {
        "padding-right": "8px"
      },
      "txtContent": "@currentField.title"
    },
    {
      "elmType": "a",
      "attributes": {
        "iconName": "Mail",
        "class": "sp-field-quickActions",
        "href": "='mailto:' + @currentField.email + '?subject=Task status&body=Hey, how is your task coming along?.\r\n---\r\n' + @currentField.title + '\r\nClick this link for more info. http://contoso.sharepoint.com/sites/ConferencePrep/Tasks/Prep/DispForm.aspx?ID=' + [$ID]"
      }
    }
  ]
}