Get-Group-Info

{
  "groups": [
    {
      "admins": [
        "whatsapp-id-1",
        "whatsapp-id-2"
      ],
      "creation_time": 123456789,
      "creator": "whatsapp-id-1",
      "participants": [
        "whatsapp-id-3",
        "whatsapp-id-4",
        "whatsapp-id-5"
      ],
      "subject": "your-group-subject"
    }
  ],
  "errors": [
    {
      "code": 1234,
      "details": "optional-detailed-error-message",
      "title": "error-code-title"
    }
  ],
  "meta": {
    "api_status": "deprecated",
    "version": "whatsapp-business-api-client-version"
  }
}