Error creating a request using API

Error creating a request using API

Hello to all,

We have Manage engine Service Desk Plus 9.3 build 9308 
I trying to use the API of Manage Engine SD Plus to create request, but when I use the simulator to try, jump the next error "Mandatory element `Account` " not found, Status: "Failed" . I am writing correctly my code and the correctly account.

1. Please help me, to solve and  can I create and create the request?
2. Do you have documentation about API for the version that we are using?
3. What is requesterid, is it important, where I found it, is it generated automatically?
4. Do yu have examples to create request from PHP using API?

Thanks for your help
I Attach a image with the error

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