{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe825a65e55322337d1e8a858ed3cba2b282a22b8c8555fb9935954d9ee787c04",
    "signature": "0xc4855c780393c039d07e97a6ea55e9177c63df07c534366f472b8a1c9bd9455316264d823ae7c49569491d8a70b1f35d579ebb17b6a413e2af8bb40c3278fc1b1c",
    "signer": "0x33892C91AF7a2aA34ff26f688557426a58D8c18a",
    "userId": "873346349"
  }
}