{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8d1567b245c97fdfac416b3f8f7c1676d04d949584abc5bc219f366b2db27276",
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    "signer": "0x33769231a1466b9f67935370047955160954f3B3",
    "userId": "451488999"
  }
}