How configure custom_webhook in Error Notification policies?

Describe the issue:

Im trying to configure Error Notification in Index Management Policies, when a Rollover fails, get a notification in my Opsgenie, but I get an error 403 Forbidden.


error_notification": {
“destination”: {
“custom_webhook”: {
“path”: null,
“header_params”: {
“Authorization”: “GenieKey XXXXXX-XXXXXXXX-XXXXX-XXXXXXX”,
“Content-Type”: “application/json”
“password”: null,
“scheme”: null,
“port”: -1,
“query_params”: {},
“host”: null,
“url”: “”,
“username”: null
“message_template”: {
“source”: “{ message: TEST}”,
“lang”: “mustache”

Relevant Logs or Screenshots: