{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6d21481a4b2ed2798962dda0fd70c9b597145c2187dc5d78ecbe75e92c25995d",
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    "signer": "0xFDE85dE49F586bD46f93bBad653520D878cCdD47",
    "userId": "843706290"
  }
}