{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb212e7187d854d2fb2650a9555c6a823619574215dff1a27f604adafc03e9f69",
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    "signer": "0xbdC16680444F52661d79e5c862839ab73ab7DBe0",
    "userId": "267761681"
  }
}