Validate rule as function for the field Quote Dates

Validate rule as function for the field Quote Dates

entityMap = crmAPIRequest.toMap().get("record");
date = entityMap.get("Quotes_Dates").toDate();
response = Map();
if(date <= today)
{
response.put('status','Failed');
response.put('message','date cannot be previous dates');
}
else
{
response.put('status','Success');
}
return response;


Hi Im new in coding using deluge, Whenever I Save and Execute,

Theres a pop up showing 

Execute Function
stringcrmAPIRequest
= 




Then Save button


What should I put in the text box?