{
  "manageEntity": {
    "action": "Save",
    "entityId": "1081644738",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8c0c0860af69ef602436cf2e7ed39447c580f812794f8d38129bb95134a0da90",
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    "signer": "0x8A509b86BfAA1675d1fB299Ae24B4Aa53Bca7f8C",
    "userId": "550"
  }
}