gistfile1.txt

$ echo "pAkH5a9ubW3Etf8SDO548F6ZjuMKNc0I4Cia1lonDv0.eyJhbGdvcml0aG0iOiJITUFDLVNIQTI1NiIsImlzc3VlZF9hdCI6MTM0NzkxMTYxNywicGFnZSI6eyJpZCI6IjI4NzQzNTk4MTM2OTUwNyIsImxpa2VkIjpmYWxzZSwiYWRtaW4iOnRydWV9LCJ1c2VyIjp7ImNvdW50cnkiOiJkZSIsImxvY2FsZSI6ImVuX1VTIiwiYWdlIjp7Im1pbiI6MTMsIm1heCI6MTd9fX0" |cut -d. -f2 |base64 -d |json_pp
base64: invalid input
{
   "algorithm" : "HMAC-SHA256",
   "page" : {
      "admin" : true,
      "liked" : false,
      "id" : "287435981369507"
   },
   "user" : {
      "country" : "de",
      "locale" : "en_US",
      "age" : {
         "min" : 13,
         "max" : 17
      }
   },
   "issued_at" : 1347911617
}