delay run Command at random but certain time period without sleep in crontab

delayRun

#!/bin/bash
#receive command
#you neet atd daemon to do this
cmd="$*"
echo $cmd
[[ $cmd == "" ]] && { echo 'Command Can Not be Empty' ; exit 1; }
command -v at  >/dev/null 2>&1 || { echo "I require 'at command' but it's not installed.  Aborting." >&2; exit 1; }
#set how many minutes to delay
range=2-350
echo 'sleep ' $(shuf -i 1-60 -n 1) ';' $cmd |at now + $(shuf -i $range -n 1) min