Create Contact

//  Create a Map to store all the data of a Contact
Map<String, Object> nsContact = new Map<String, Object>();
    nsContact.put('firstName', 'James');
    nsContact.put('lastName','Williams');
    nsContact.put('subsidiary', new Map<String, Object>{'internalId'=>'1'});
    nsContact.put('email', 'james@grandhotel.com');
    nsContact.put('company', new Map<String, Object>{'internalId'=>'32342'});
    nsContact.put('phone', '3453254543');
    nsContact.put('officePhone', '6546564564');
    nsContact.put('title', 'CEO');
    nsContact.put('isPrivate', true);

//  Initializing the Contact Custom Fields
List<Object> conCustomFieldList = new List<Object>();
Map<String,Object> conCustomField1 = new Map<String,Object>();
    conCustomField1.put('fieldType', 'boolean');
    conCustomField1.put('scriptId', 'custentity_f3_mm_send_wf_sms');
    conCustomField1.put('value', 'true');
    conCustomFieldList.add(conCustomField1);
Map<String,Object> conCustomField2 = new Map<String,Object>();
    conCustomField2.put('fieldType', 'string');
    conCustomField2.put('scriptId', 'custentity_alt1_email');
    conCustomField2.put('value', 'james12@gmail.com');
    conCustomFieldList.add(conCustomField2);

//  Adding the Contact Custom Fields
    nsContact.put('customFieldList', new Map<String,Object>{'customField'=>conCustomFieldList});

//  Initializing the Contact Addresses
List<Object> addressBookList = new List<Object>();
Map<String,Object> addressBook = new Map<String,Object>();
Map<String,Object> addressbookAddress = new Map<String,Object>();
    addressbookAddress.put('addr1','Suite 201');
    addressbookAddress.put('addr2','2334 Park Street Avenue');
    addressbookAddress.put('city','Chicago');
    addressbookAddress.put('state','IL');
    addressbookAddress.put('country','_unitedStates');
    addressbookAddress.put('zip','60601');
    
    addressBook.put('addressbookAddress',addressbookAddress);
    addressBook.put('defaultBilling',true);
    addressBook.put('defaultShipping',true);
    
    addressBookList.add(addressBook);
    
    nsContact.put('addressbookList', new Map<String,Object>{'addressbook'=>addressBookList}); 

//  Initializing the RequestJSON Data to be passed.
Map<String, Object> requestJSONMap = new Map<String, Object>();
    requestJSONMap.put('contacts', new List<Object>{nsContact});
    String reqJSON = JSON.serialize(requestJSONMap);

Map<String, Object> reqObj = new Map<String, Object>();
    reqObj.put('version', '1.0');
    reqObj.put('action', 'createContact');
    reqObj.put('requestJSON', reqJSON);

//  Placing a request to Breadwinner Global API
Map<String, Object> resp = breadwinner_ns.BreadwinnerNetSuiteAPI.call(reqObj);
System.debug(resp);

{
  action=createContact,
  timestamp=1607423183079,
  validRequest=true,
  version=1.0,
  responseJSON={
    "status": "200"
    "errors": [],
    "contacts": [
      {
        "title": "CEO",
        "subsidiary": {
          "type": null,
          "name": "Parent Company",
          "internalId": "1",
          "externalId": null
        },
        "salutation": null,
        "salesforceID": "a022w00000IXl0bAAD",
        "publicSubscriptionStatus": null,
        "phone": "3453254543",
        "officePhone": "6546564564",
        "nullFieldList": null,
        "mobilePhone": null,
        "middleName": null,
        "lastName": "Williams",
        "lastModifiedDate": 1607423181,
        "isPrivate": true,
        "isInactive": false,
        "internalId": "32542",
        "homePhone": null,
        "firstName": "James",
        "fax": null,
        "externalId": null,
        "entityId": "James Williams",
        "email": "james@grandhotel.com",
        "defaultAddress": "James Williams\nSuite 201\n2334 Park Street Avenue\nChicago IL 60601\nUnited States",
        "dateCreated": 1607423180,
        "customForm": null,
        "customFieldList": {
          "customField": [
            {
              "valueLookup": null,
              "value": "true",
              "scriptId": "custentity_f3_mm_send_wf_sms",
              "internalId": "428",
              "fieldType": null
            },
            {
              "valueLookup": null,
              "value": "james12@gmail.com",
              "scriptId": "custentity_alt1_email",
              "internalId": "485",
              "fieldType": null
            }
          ]
        },
        "company": {
          "type": null,
          "name": "CUST533AT Grand Hotels & Resorts Ltd",
          "internalId": "32342",
          "externalId": null
        },
        "comments": null,
        "assistant": null,
        "altEmail": null,
        "addressbookList": {
          "replaceAll": null,
          "addressbook": [
            {
              "label": "Suite 201",
              "isResidential": null,
              "internalId": "29889",
              "defaultShipping": true,
              "defaultBilling": true,
              "addressbookAddress": {
                "zip": "60601",
                "state": "IL",
                "internalId": null,
                "country": "_unitedStates",
                "city": "Chicago",
                "attention": null,
                "addrPhone": null,
                "addressee": "James Williams",
                "addr3": null,
                "addr2": "2334 Park Street Avenue",
                "addr1": "Suite 201"
              }
            }
          ]
        }
      }
    ]
  }
}