{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf3c469085d4806410ba19f1544f721127be667304f7fd5e292ffdb6abb5b09b4",
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    "signer": "0xdBA5548Db841AA01126C5Fd78d007af63Bd82F3f",
    "userId": "504460753"
  }
}