curl --request GET \
  --url https://app.ezzydoc.com/EzzyService.svc/Rest/getMyApprovalGuid2

{
  "approval_guid": "<string>",
  "invoice_id": 123,
  "service_status": {
    "invoice_id": 123,
    "message": "<string>",
    "status": 0
  }
}