{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1f86d1a26ad35f55e8fe258c5e693859d730904df8c202c46ae52becafabf36a",
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    "signer": "0x91af5371612191C6FEf370a9bC459526ff717F0A",
    "userId": "991145388"
  }
}