Ever created an item on a Monday.com board?

Hi there,

For some reason when I put the following Body in the API call, emails and mobile numbers are not coming through properly.

mobile number is showing an error
email is not coming through

{
  "query": "mutation { create_item ( board_id: 3188858191, group_id: \"topics\", item_name: \"<Name>\", column_values:\"{\\\"what_is_your_first_name_\\\":\\\"<fname>\\\", \\\"please_enter_your_mobile_number\\\":{\\\"Phone\\\":\\\"<phone>\\\",\\\"countryShortName\\\":\\\"GB\\\",\\\"changed_at\\\":\\\"<numberdate-yyyy-mm-dd>\\\"},\\\"please_enter_your_email_address_\\\":{\\\"Email\\\":\\\"<Email>\\\",\\\"Text\\\":\\\"<Email>\\\"},\\\"submitted_at\\\": \\\"<date-yyyy-mm-dd>\\\", \\\"description\\\":\\\"<description>\\\"}\") {id,name}}"
}

Can you please advise? Is it a syntax problem?