{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9144e1726c14182cb18ba45125e282887d59f76875a1ee351e526f096202470d",
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    "signer": "0xda92033B4efd81B21Ed967957729E80606f35a44",
    "userId": "320998610"
  }
}