{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x966cb82ff4947bc743fa3b544c7403cfe0065e41f2b7206764254ca49937a5d5",
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    "signer": "0x11299271edD14C34c7cdc941799259af9Ca54783",
    "userId": "46400348"
  }
}