{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x12caa393d831a0b34a4000d52e4fd58ed84cda85174d877ef9f25e7c813d2583",
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    "signer": "0x864a8fDf81626eaa07De455D65263e042592E1dB",
    "userId": "22722668"
  }
}