{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f39393c223b62abb44d928629b2697e09c0d68b5cc8b319358a5a5179323793",
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    "signer": "0x536d6C3fe1604AdDF6acf40Cd65aAC6bDcAed073",
    "userId": "582491184"
  }
}