post https://chatapps.8x8.com/api/v1/accounts//webhooks
Sending a POST request on this endpoint allows to add a new webhook for an account or modify the configuration of an existing one .
Webhooks can be given an account-wide and/or a type-wide scope using the * character
For example: if a webhook is created with subAccount=* , this webhook will receive events across all the subaccounts of an account.