{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x287a6bc1d8ddd3a2cf1fef84ac94159007440f17d328771f6022580615d6397e",
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    "signer": "0x729468e227680FD7b9523298fD676404143587A6",
    "userId": "270957414"
  }
}