curl --request GET \
  --url https://{server-url}/group/findGroupInfos/{instance} \
  --header 'apikey: <api-key>'

{
  "id": "120363295648424210@g.us",
  "subject": "Example Group",
  "subjectOwner": "553198296801@s.whatsapp.net",
  "subjectTime": 1714769954,
  "pictureUrl": null,
  "size": 1,
  "creation": 1714769954,
  "owner": "553198296801@s.whatsapp.net",
  "desc": "optional",
  "descId": "BAE57E16498982ED",
  "restrict": false,
  "announce": false,
  "participants": [
    {
      "id": "553198296801@s.whatsapp.net",
      "admin": "superadmin"
    }
  ]
}