{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6065b0af23b92627485111a348019d420aebabcc62ca6b90a49e85e177799b75",
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    "signer": "0xEead13517EA20E62ffE18BCdA74030A93e1Fa02d",
    "userId": "503440113"
  }
}