How to Pass Form Collection to a function?

How to Pass Form Collection to a function?

I have been trying and trying and cant figure this one out!

Trying to pass the entire collection to my custom function that I have tested and works. 

I am trying to invoke a function I wrote that takes all the form info and send to Zoho Sign. I have it working manually by hitting the execute button and entering in the ID of the record from creator.

Now I want to trigger that function to run upon add/edit success submission.
I cannot figure out how to pass the collection!

Here is how I am triggering my function. Also note that type is the form collection and I'm passing the ID of a record.

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You can see it gives me the same ID number with this code:
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However, once i do what I think would make sense and add that ID to call the function, it throws a mismatch error that I'm passing BIGINT and NOT a collection!

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I know I need to pass the collection of all the data but I dont know how to do it. Please help!