{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x19bd2bc2c53622bce126b90fe66a3a8fe340e499c04c2b71fe0f3decf73a8600",
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    "signer": "0x0e203AEFcCEd665ecbcE27153A02AAf6842934B1",
    "userId": "673436853"
  }
}