#!/bin/bash

if [ "$1" == "" ] || [ "$1" == "--help" ]; then
  echo "Usage: $0 [JSON_WEB_TOKEN]"
  exit 1
fi

IFS='.' read -r -a PARTS <<< "$1"

echo "Head: "
echo $(echo -n "${PARTS[0]}===" | base64 -d 2>/dev/null)
echo
echo "Payload: "
echo $(echo -n "${PARTS[1]}===" | base64 -d 2>/dev/null)