{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x44e48bc6a17a031b946eeb767b46e266129f00e78132d0aab610595916d51e24",
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    "signer": "0x3F595cc9681E304c2Beb91BDEaD7E4B7c8A99caD",
    "userId": "377016458"
  }
}