{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0eab8f8ca50d48013650acde7b48a5a53ac9e78b62e911ff62efaaafb7ea22d6",
    "signature": "0x51a0497b2ce34ea11d2eb5c7c9b44f283b375dff04d4e87175de41d988d4761f1c30aa7d9742ef91a967bb0a23c88e81e1c450fb5554362990a7ae0a1b660c4e1c",
    "signer": "0x5aA9Aef60E37A9524A78d9969Ada9b8113513D4B",
    "userId": "565957720"
  }
}