Here is my scenario:
1) Contacts come into CRM via sign up form

2) They transition to Sales module via workflow when selecting a transition of "made contact"
3) Once in Sales, if "New Appointment" is selected a new record is created in a custom Module Sales to Campaigns
4) All contacts in sales to campaigns are synced with Zoho Campaigns and a drip campaign begins.

All of this works well. But, if fields change in the Sales Module (Stage, Date, etc) how do I update the info in the corresponding "Sales to Campaigns" Module? 

I have tried using a deluge script like so that is fired on feild update in a work flow rule:

2. saleIdLong = input.saleId.toLong();
3. saleDetails = zoho.crm.getRecordById("Sales",saleIdLong);
4. mp = map();
5. mp.put("Stage",ifnull(saleDetails.get("Stage"),""));
6. 
   
7. create = zoho.crm.create("Sales_to_Campaigns", mp);
8. info mp;
9. info create;

But its not working, I'm not sure I want to use zoho.crm.create, I think zoho.crm.update might be what I need to do but I cant seem to associated the Sales record with the created Sales to Campaigns record.  

So, How would I update the Sales to Campaigns record? Can I look up records via email? Or is there a way to save the created Sales to Campaigns record Id on the Sales Module and use that?

Any response to this is welcome. my thanks in advance.