Question about python and base64 encoding

Hi everyone, I have a question. I was writing the code, and it was supposed to get a link to the image. But this link was, as I understood, encoded in base64, because when I output it to the console, it was written 'data:image/png; base64,' and after the comma there was an encoded link. Well, I decided to decode,everything seemed to go fine, but when I decoded from base64, and after that I started decoding from UTF-8, the error 'Like UTF-8 can't decode the first character'came out. Well I I decided to output a link to the console, after decoding from base64, and oh my God, I thought there would be a regular link to the image, but there was something like: '\x89PNG\r\n\x1a\n\x00\x00'(and it was sooo big). What's it? Also some kind of encoding? What should I do?

from selenium import webdriver
from time import sleep
from selenium.webdriver.chrome.options import Options 
import base64

def abstract(text):
    chrome_options = Options()  
    chrome_options.add_argument("--headless")
    
    driver = webdriver.Chrome(chrome_options=chrome_options)
    driver.get('https://coo.by/writer_new')
    
    content = driver.find_element_by_css_selector('#text')
    content.send_keys(text)
    
    seal = driver.find_element_by_css_selector('#write')
    seal.click()
    sleep(5)
    
    image = driver.find_element_by_id('list_img').get_attribute('src')
    print(image)
    image_x = image.split(',')[1]
    print(image_x)
    a = image_x.encode('UTF-8')
    b = base64.b64decode(a)
    print(b)
    png_recovered = b.decode('UTF-8')

    return png_recovered 

image = abstract('Andrei')
print(image)