I'm trying to import contacts via v3 of the api. I found some errors in their example script, and made some tweaks to get it to work properly with Python's requests module. When I run my script, I get a 200-OK response, but when I check on my import progress, I get that it is 100% complete, 0 were added, 0 updated, and 0 failed. And when I check my mailing list, nothing has been added. If I rename one of my contact fields, I get a "400 - Bad Request" with an error message of "Invalid panelMember field provided", so I know I'm talking with the server. Here's a minimum working sample to reproduce the problem: (just replace Token,MailingListID, and DataCenter) ``` import requests import json dict_Contacts = [ { "id": "MLRP_123456789012345", "firstName": "ExampleFirstName", "lastName": "ExampleLastName", "email": "example@example.com", "language": "SP", "unsubscribed":1, "externalReference":"Example", "embeddedData": {"ExampleField1":"example_field_val_1", "ExampleField2":"example_field_val_2"} } ] Token = 'My_Token' MailingListID = 'My_Mailing_List' dataCenter = 'My_Data_Center' url = "https://{0}.qualtrics.com/API/v3/mailinglists/{1}/contactimports/".format(dataCenter, MailingListID) headers = { 'x-api-token': Token, 'contentType':'application/json' } json_string = json.dumps(dict_Contacts) files = {'contacts': ('contacts', json_string, 'application/json')} request = requests.post(url, headers=headers, json={'contacts':dict_Contacts}) print(request.text) ```