jellyfin-plugin-webhook/Jellyfin.Plugin.Webhook/Templates/Pushover/PluginInstalling.handlebars

{
    "token": "{{Token}}",
    "user": "{{UserToken}}",
    "device": "{{Device}}",
    "title": "{{{Title}}}",
    "url": "{{ServerUrl}}/web/index.html#!/details?id={{ItemId}}&serverId={{ServerId}}",
    "url_title": "{{{MessageUrlTitle}}}",
    "priority": {{MessagePriority}},
    "sound": "{{NotificationSound}}",
    "message": "Installing plugin {{PluginName}} version {{PluginVersion}}..."
}