{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x56d79b361e694ac6035c29b4555f21c452c14441145c922ca65e72dfe1e3bf62",
    "signature": "0x6ae5f8ed5094c4b6d9c046a0165a34ddf4396e0477f71b5e5ed57e38b1b30d8f2cb8b484adde7c5dd640606d414ccc71d1e7b1d21cc9a913d420ef364a03fe2d1b",
    "signer": "0x766383d317Cba5FC7819ecd3E1381C0B41600b30",
    "userId": "855744457"
  }
}