{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ceb55e4765683acc9db039b7c23f1438b6a6fa500be01d6950dbe32452c2331",
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    "signer": "0xbC1d4212c5ee7b31902Eaa56A119A5610B6bAC2A",
    "userId": "516135902"
  }
}