{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1930d84d3a8565fefd3fbc293a461fefb7a36890be27e49cd60e1ea73d4bb598",
    "signature": "0x001e2353e2ca64a5339080118ea6616472f40738aaee451899d50f2009e1645403638fcd30395c5b2af6673357dc5e22a8077bf0de996bb7137ba4b6c4c734ec1b",
    "signer": "0x532a72Ac9fB52B1ED282c27d1d2C654AA73ae124",
    "userId": "896586517"
  }
}