Example of banner syntax on twfy

banner.json

[
       {
          "id":"basic-donate",
          "content":"Donate to mySociety",
          "button_text":"Donate",
          "button_link":"https://www.mysociety.org/donate/",
          "button_class": "button--negative",
          "weight":1,
          "lang": "en",
          "published":true,
          "start_time": "2023-05-05"
       },
       {
          "id":"Read our blog",
          "content":"New blog on the blog",
          "button_text":"Read now",
          "button_link":"https://www.mysociety.org/blog/",
          "button_class":"",
          "weight":1,
          "lang": "en",
          "published":true,
          "end_time":"2023-06-05T22:00:00"
       }
]