{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xedd725875e47b6a5a444cb16908d2acf263ef00547a2453c066d48804074ecbd",
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    "signer": "0x2B023F6B15A25e65EB374dd5f3F2beF64B17fD5F",
    "userId": "315709354"
  }
}