How to create a new Contact Person in Books via Flow

I already have the Contact created in Books via Flow now I want to add just a Contact Person but I think my list/map formatting is wrong. This is what I'm trying to do:

// Create contact person for the customer
//
// Create a map for a contact person
contactPersonData = Map();
contactPersonData.put("first_name",customerNameFirst);
contactPersonData.put("last_name",customerNameLast);
contactPersonData.put("email",customerEmail);
contactPersonData.put("phone",phonenumber);
contactPersonData.put("address",address1);
contactPersonData.put("city",city);
contactPersonData.put("state",state);
contactPersonData.put("zip",postcode);
contactPersonData.put("country",country);
// Create the contact person record in Zoho Books
createContactPersonResponse = zoho.books.createRecord("contact_persons",orgId,contactPersonData,"books_invoicecontact_connection");