{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2645f0edad6517e63a68e8642d0f221c19cb63a13e9ca07adf5b324837b72ec6",
    "signature": "0x37aa8c4b964aaca0247b276e65c6aa16c56bc4af33a1675ebab135d0f627d823404a47187743fee523729f68a8fd5736d1f0570b8575e55294caab498a8a15f61b",
    "signer": "0xfBd4DB3bCa5fFBA89e45aBc1dfde8dbD5CceeD0C",
    "userId": "778413362"
  }
}