{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xefc601ede82da397c2cc8d9d909e4d5e1f2cc05e936b03940fed3a2773b50b21",
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    "signer": "0x2bf645D4427C9f0AC4d35bb50a720133BD24D339",
    "userId": "333361570"
  }
}