curl --request GET \
  --url https://test.deribit.com/api/v2/public/get_announcements \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 7661,
  "method": "public/get_announcements",
  "params": {}
}
'

{
  "jsonrpc": "2.0",
  "id": 3022,
  "result": [
    {
      "title": "Example announcement",
      "publication_timestamp": 1550058362418,
      "important": false,
      "id": 1550058362418,
      "body": "Lorem ipsum dolor sit amet, consectetur adipiscing elit."
    }
  ]
}