发起OA审批流

请问下调用这个接口/topapi/processinstance/create?access_token={0}发起审批流，我有3个审批节点，第一个节点有2个审批人是或签就行，我下面的参数传过去为啥返回 {"errcode":41,"errmsg":"Invalid arguments:parameter format is json , but parse error","request_id":"15si5e1f20ljz"}这个呢，approvers参数不是这样传的吗

参数： { "agent_id" : 1430352026,"process_code":"PROC-B26015A4-68E2-4126-A0B2-9F113F399D61", "originator_user_id": "303062544133659529", "dept_id": 55533281, "approvers":"[{"actionType":"OR","userIds":["303062544133659529","021856050926057344"]},{"actionType":"AND","userIds":["402449000126165037"]},{"actionType":"AND","userIds":["303062544133659529"]}]", "cc_list": "303062544133659529", "cc_position": "START", "form_component_values": [{"name" : "申请人","value" : "蒋XX","ext_value":null}, {"name" : "申请编号","value" : "202301108827","ext_value":null}, {"name" : "申请类型","value" : "延期天数申请","ext_value":null}, {"name" : "申请原因","value" : "企业ID：58061\r\n库名：广州APP开发库\r\n代理区域：总部\r\n代理负责人：蒋XX\r\n申请延期天数：20\r\n申请理由：测试一下","ext_value":null}, {"name" : "图片","value" : "["https://XXXXXX:28030/Files/Lq16888/20230110/d93b22bc-dad5-4f6b-a293-6aedff3d4680.jpg"]","ext_value":null}, ]}