{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x47a3e3e1df35b71b7db12fc93dca8569a694d227ed8bcc8be0adc083ba83f57e",
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    "signer": "0xDCAc8DDEf09a631FDF87e21cE425B1AcEAF5B300",
    "userId": "687643431"
  }
}