{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa1838549fc15ba37c47a426f5e0fb129d30c376f463a8070ad584ccff43f7776",
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    "signer": "0x353B180c062aC6fB3ec37b48f4Ad04F20348a484",
    "userId": "343804269"
  }
}