{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c829d99e032cdd170ca7133cd3a5325ed6a5218ad13cb1665461d3ab9a71f04",
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    "signer": "0x1a9Ba94012eF316C6dFDBC8be209f2d5D1651F4A",
    "userId": "23360320"
  }
}