{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6d0ee76b1d18e706b12603d55be75c64fbd64b561e1ed57d835b9c0bb061e744",
    "signature": "0x7fcf38262acf3a2525432370cf8d51238b813d2b07ed085e5f08e03a299455d667221b1deb9155d81bb410224c8bcd54bc68c4e3e1b86477f1689818e021a4421b",
    "signer": "0x7964a5eF7E9a780013d3886B40ca04443D69588D",
    "userId": "224019652"
  }
}