# SIM Pools Payloads

Occurs when certain rules related to the SIM Pool has been triggered. 

**rule.pool.usage.triggered** – occurs when Pool usage has been changed (Listing 5.19). 

**Listing 5.19 – Example of rule.pool.usage.triggered Payload (JSON)**

<pre><code>{
<strong>    "type":     "rule.pool.usage.triggered",
</strong>    "data":     {
        "rule":     {...//Rule Model},
        "pool":     {...//Pool Model}
    },
    "created_at":  {...//Date Time Model}
}
</code></pre>