{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf0b0baf0854bf39de70cb136fe1181f86cf4887ecf585a2caf7d6c9557586844",
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    "signer": "0xBCb96c4190ece89b9b603DD72a53771e861A2A9d",
    "userId": "960205221"
  }
}