luci/applications/luci-app-natmap/root/usr/share/rpcd/acl.d/luci-app-natmap.json

{
	"luci-app-natmap": {
		"description": "Grant access to LuCI app natmap",
		"read": {
			"file": {
				"/var/run/natmap/*": [ "read" ]
			},
			"ubus": {
				"service": [ "list" ]
			},
			"uci": ["natmap"]
		},
		"write": {
			"uci": ["natmap"]
		}
	}
}