{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7c922d00c2ff84d6eec5450d884ba6b952fd893edbab9e6ce66363dd68065297",
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    "signer": "0xb72D37Ebf634757b65Ca8e601e3Ac59f98f1fc4F",
    "userId": "478992451"
  }
}