{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x27b56daeabde0b5484501425249a9090e05ae10cefb05b04d290774ced815573",
    "signature": "0xd36c21f5e41ab64c059efd251230ea8626d8f8beb96e072d01bcbd9b4c70ea721a42dc70d6f204dbbfb919a6cb955939041ac410ec32d5eed276fd35712b478e1b",
    "signer": "0x14D33c0e56287a84a68E500392B3625625369333",
    "userId": "49727432"
  }
}