{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7b290a2271aa33078841b015681cc676d8b4bb305f833ccc6e9878cb6984d55e",
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    "signer": "0x1C65823c662e6d912ae948e3971B727550397651",
    "userId": "312556877"
  }
}