Hello!
I created a new Functional role with oData operations permission and add it to User. 
Using Postman can GET data from "Contact" collection with this User credentials. It also can create new Contact using POST method.
PATCH returns:  403 - Forbidden: Access is denied
DELETE returns:  405 - HTTP verb used to access this page is not allowed

What permissions I have to grant to this Functionsl role and how?

This instruction
https://academy.creatio.com/docs/developer/integrations_and_api/data_se…
say for 405
"The response should contain the Allow header with the list of request methods the resource supports."
Postman returns:
 405 - HTTP verb used to access this page is not allowed

 The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access.

Can you help?