{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe458e7834dca3e9fed39eacb7278ad97af5df0043fa76b056bb6f192c0d62caa",
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    "signer": "0xFE26Ced17D84653bCd93A08D335ed2046810d424",
    "userId": "671918813"
  }
}