Synchronization of Bitrix 24 (cloud) and 1cfresh (cloud) accounts via REST API

When generating an account in a transaction, it is necessary to create an account in 1cfresh (cloud) with goods and a counterparty.
If an account with such a number already exists in 1cfresh, update the current account and related products and the counterparty (if there are changes).
Synchronization is one-way, i.e. when the data changes on the 1C side, no actions need to be performed.

Data exchange should work through an outgoing webhook – document generation. The necessary actions on the B24 side will be able to configure ourselves, including unloading the necessary data arrays. Experience is only in PHP.
At the moment, we already have configured the exchange of site and B24 data through web hacks and scripts in PHP.
I am interested in how possible it is to perform an exchange with 1C in this way.

The attachment described an approximate algorithm of work and gave examples of transmitted data arrays from B24.

1C Version and Configuration:
- 1C:Enterprise 8.3 (8.3.17.2617).
- Company Accounting, Edition 3.0 (3.0.116.27).

Tariff B24 – Project (2018 archival).