{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x903b052ff3833cb630d88829add684e76a45ff02f4d560690c836836c5ba5262",
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    "signer": "0xaDAcd694B493000FBA2f099C5b5cE89D1F67267a",
    "userId": "850984408"
  }
}