{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3ee604d4f8383b9e7393f6e1da31e30c5c42558c2a99490684ef3b46bc58ffee",
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    "signer": "0x2725361827a64888ba9a684719171faF8eBdd2b7",
    "userId": "936031400"
  }
}