## Retry behavior
Each event will be sent a maximum of 4 times at the following time intervals:
* Immediately
* After 1 minute
* After 5 minutes
* After 15 minutes

If the event is acknowledged within a 5-second window, no more retries will be attempted.
Each retry of the event will have a newly generated `X-Signature`, but the event `id` will be the same for all retries.