Have fun with it :), v1.0 ; works fine for me at least....

psdle.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#  psdle.py -- does the same thing as PSDLE does...
#  Copyright (C) 2018  Gnarmagon
#  
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#  
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <https://www.gnu.org/licenses/>.

import os
import sys
import json
from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets, QtWebEngineCore


ua_windows = ('Mozilla/5.0 (Windows NT 10.0; WOW64; rv:57.0) '
			  'Gecko/20100101 Firefox/57.0')


class BrowserReqIntercept(QtWebEngineCore.QWebEngineUrlRequestInterceptor):
	tokenS = QtCore.pyqtSignal(str)
	def __init__(self, parent=None):
		super().__init__(parent)
		self.page = parent

	def convertRederictUrl(self, url):
		try:
			return url[57:].split('#')[1].split('&')
		except IndexError:
			return None

	def interceptRequest(self, info):
		target = info.requestUrl()
		self.urlLnk = target.url()

		if self.urlLnk[:57] == "https://store.playstation.com/html/webIframeRedirect.html":
			if self.convertRederictUrl(self.urlLnk) is not None:
				token = self.urlLnk[57:].split('#')[1].split('&')[0].split('=')[1]
				self.tokenS.emit(token)
				print("[DEBUG] Bearer Token: {}".format(token))



class PSDLE_MainWindow(QtWidgets.QMainWindow):
	def changeUrl(self, token):
		print("[DEBUG] signal received: {}".format(token))
		request = QtWebEngineCore.QWebEngineHttpRequest()
		request.Method(0)
		# items are set to a maximum of 9 999 999
		request.setUrl(QtCore.QUrl('https://commerce.api.np.km.playstation.net/commerce/api/v1/users/me/internal_entitlements?meta_rev=0&revision=0&start=0&size=9999999&fields=meta_rev%2Ccloud_meta%2Creward_meta%2Cgame_meta%2Cdrm_def%2Cdrm_def.content_type'))
		bdata1 = b'authorization'
		bdata2 = 'Bearer {}'.format(token).encode('ascii')
		request.setHeader(QtCore.QByteArray(bdata1), QtCore.QByteArray(bdata2))
		self.webView.load(request)
		self.webView.loadFinished.connect(self.exportData)

	def setupUi(self, MainWindow):
		# Window stuff
		MainWindow.setObjectName("MainWindow")
		MainWindow.resize(1000, 800)
		self.centralwidget = QtWidgets.QWidget(MainWindow)
		self.centralwidget.setObjectName("centralwidget")
		self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
		self.gridLayout.setObjectName("gridLayout")
		MainWindow.setCentralWidget(self.centralwidget)
		self.statusbar = QtWidgets.QStatusBar(MainWindow)
		self.statusbar.setObjectName("statusbar")
		MainWindow.setStatusBar(self.statusbar)

		self.retranslateUi(MainWindow)
		QtCore.QMetaObject.connectSlotsByName(MainWindow)

		# webengine
		QtWebEngineWidgets.QWebEngineSettings.defaultSettings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.PluginsEnabled, True)
		self.webView = QtWebEngineWidgets.QWebEngineView(self.centralwidget)
		self.gridLayout.addWidget(self.webView)

		# define url and qurl
		url = "https://store.playstation.com"
		qurl = QtCore.QUrl(url)

		# set profile:
		page = QtWebEngineWidgets.QWebEnginePage()
		profile = page.profile()
		urlinterceptor = BrowserReqIntercept(page)
		profile.setRequestInterceptor(urlinterceptor)
		profile.setHttpUserAgent(ua_windows)

		# load page:
		self.webView.setPage(page)
		self.webView.load(qurl)

		# check if bearer token signal was emitted
		urlinterceptor.tokenS.connect(self.changeUrl)

	def retranslateUi(self, MainWindow):
		_translate = QtCore.QCoreApplication.translate
		MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))

	def exportData(self, event):
		if event is True:
			self.webView.page().toPlainText(self.plainTextData)
	def plainTextData(self, data):
		data = json.loads(data)
		if data['total_results'] != len(data['entitlements']):
			print("[WARNING] total_results != entitlements")
		# write to file for now....
		open('items.json', 'w+', encoding='utf-8', errors='ignore').write(json.dumps(data, indent=4))

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = PSDLE_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())