{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x668708a19435302353f6f0c7ccb6c3fdb55953acc172549561f245dd6de06427",
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    "signer": "0x72B39251a11F08be13E1fCECb325438370DaFF83",
    "userId": "853600751"
  }
}