{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb8680483b9a88aa5b12f8105246160b9815fd8930b72abc0ab3170dd5a805c0e",
    "signature": "0x845b6bd14b5fe8c54f522089402757c5717deb4bfb0209035aea04ecde8751bc0f283bc220471ad0ac466e9b541293b36b091726dd4831ebc30982de17c9703e1b",
    "signer": "0xBeeC69d585C18C8A2Ea6993Bc461b88A44141BDF",
    "userId": "765334759"
  }
}