curl --request POST \
  --url https://api.vzaps.com/instances/{id}/group/add-admin \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "groupId": "<string>",
  "participants": [
    "<string>"
  ]
}
'

{
  "code": 200,
  "success": true,
  "data": {
    "message_id": "90B2F8B13FAC8A9CF6B06E99C7834DC5"
  }
}