Update customer by ID

Example request

{
  "first_name": "",
  "last_name": "",
  "display_name": "",
  "email": "",
  "phone": "",
  "notes": "",
  "has_different_billing_address": "",
  "status": "",
  "company_name": "",
  "alt_email": "",
  "billing_address_1": "",
  "billing_address_2": "",
  "billing_city": "",
  "billing_state": "",
  "billing_zip_code": "",
  "assigned_to": "",
  "secondary_email": "",
  "secondary_phone": "",
  "service_address_1": "",
  "service_address_2": "",
  "service_address_city": "",
  "service_address_state": "",
  "service_address_zip_code": "",
  "job_notes": "",
  "customfields": [
    {
      "id": "",
      "field_instance_id": "",
      "value": ""
    },
    {
      "id": "",
      "field_instance_id": "",
      "value": ""
    }
  ],
  "locations": [
    {
      "object_type": "",
      "object_id": "",
      "title": "",
      "address_1": "",
      "address_2": "",
      "city": "",
      "state": "",
      "zip_code": "",
      "is_main_location": ""
    },
    {
      "object_type": "",
      "object_id": "",
      "title": "",
      "address_1": "",
      "address_2": "",
      "city": "",
      "state": "",
      "zip_code": "",
      "is_main_location": ""
    }
  ],
  "account_type": "",
  "pipeline_status_id": "",
  "lead_source_id": "",
  "tags": ""
}