curl --request POST \
  --url http://localhost:2222/v1/audience/groups/{groupUuid}/contacts/bulk \
  --header 'Content-Type: application/json' \
  --data '
{
  "contacts": [
    {
      "firstName": "<string>",
      "phone": "<string>",
      "lastName": "<string>",
      "gender": "<string>",
      "dateOfBirth": "2023-12-25",
      "altPhone": "<string>",
      "email": "<string>",
      "city": "<string>",
      "address": "<string>",
      "country": "<string>",
      "type": "<string>",
      "isOptedOut": true
    }
  ]
}
'

{
  "success": true,
  "message": "<string>",
  "data": {}
}