To modify a JSON request (data transfer in CRM Bitrix)

There is a request in json that binds a vendor with Bitrix CRM: when registration in the program user data fall into Bitrix. Now the query is fully constructed of lead, and that does not work check for duplicates. But we need the opposite, so that the script only enough data, but did not create the entity.
Task: rewrite the query so that it just passed the required fields (email, phone, name, number of users), not a created entity (Lead, contact). Check to make korlam.

Responsible for ordering expect to see implemented your examples under the task and working conditions.