Working with the Webhook post method.

Create/Update Variable
POST
 Please tell me when I need to insert this data(
https://app.leadteh.ru/api/v1/setContactVariable

This method allows you to create or update a custom variable. If such a variable does not exist in the bot, it will be created and associated with the user.

Query Parameters
Name           Type                  Description

contact_id*  integer                 Contact ID.

name*          string               Variable name.

value*         string               Variable value.
)
 Here I have a document, I need to insert this data into it. I don't understand where I need to insert them.help please