scrapy post请求遇到 Request Payload 报错问题

scrapy post请求遇到 Request Payload

import json
import scrapy

class JobSpider(scrapy.Spider):
    name = 'job'
    # 2.检查修改allowed_domains
    allowed_domains = ['163.com']
    # 1.修改起始url
    start_urls = ['https://hr.163.com/job-list.html']
   

  def parse(self, response):
       headers = {
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36',
            'content-type': 'application/json;charset=UTF-8'
        }
        post_data = {
            'currentPage':'1',
            'pageSize':'10'
        }
         yield scrapy.Request(
            url='https://hr.163.com/api/hr163/position/queryPage',
            method="POST",
            body=json.dumps(post_data),
            headers=headers,
            callback=self.after_parse()

        )
    def after_parse(self,response):
        yield scrapy.Request(response.text)

请求的网址是：

在network XHR 中queryPage中发现是post请求 Request Payload 去网上寻找了解决方案 还是报以上的错误 因为是自学的 帮忙看一下是什么问题