{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd93d6863bd84ce0acd1a6ced60a1d7f65b6809fba4683b7c85161ef7baea118e",
    "signature": "0x58396c1cbe9f2a634d04bfea00b91a82471dca1aef4de1929ac8efa2db7baa89271ecb39773b7305940bb60620dd42ebcb39c67fc16656dfb4901ba360edd8811c",
    "signer": "0x607D26fCBC981BBf1f9b7a1ee2EB8444b128239C",
    "userId": "68884680"
  }
}