{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8a1d39c596d1e3ce58918487ec407b86c46363b8de871426ad530653352b7ca8",
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    "signer": "0x565C3EA1622dCCfD1923377061F4022FeCE6b427",
    "userId": "389557119"
  }
}