When I get an error in Splunk I would like to send an Alert to Slack, my company blocked E-Mail for the Slack so I need to use Webhook. I have added the Webhook to the alert of my search query, however the payload is:

{
    "result": {
        "sourcetype" : "mongod",
        "count" : "8"
    },
    "sid" : "scheduler_admin_search_W2_at_14232356_132",
    "results_link" : "http://web.example.local:8000/app/search/@go?sid=scheduler_admin_search_W2_at_14232356_132",
    "search_name" : null,
    "owner" : "admin",
    "app" : "search"
}

which does not tell me what this alert is about and / or any message.

Is there any way that I can modify this payload to maybe accept more metadata? Variable to a little bit more info?