curl --request PATCH \
  --url https://api.revolv3.com/api/Customers/{customerId} \
  --header 'Content-Type: application/json-patch+json' \
  --data '{
  "merchantCustomerRefId": "1234-5678-9101",
  "firstName": "Jonathan",
  "lastName": null
}'

{
  "customerId": 1,
  "merchantCustomerRefId": "1234-5678-9101",
  "firstName": "Jonathan",
  "lastName": "Doe",
  "billingAddresses": [
    {
      "addressId": 1,
      "addressLine1": "100 Main Street",
      "addressLine2": null,
      "city": "Santa Ana",
      "state": "CA",
      "postalCode": "90000",
      "phoneNumber": null,
      "email": null,
      "country": "US"
    }
  ],
  "shippingAddresses": [
    {
      "addressId": 2,
      "addressLine1": "101 First Street",
      "addressLine2": null,
      "city": "Costa Mesa",
      "state": "CA",
      "postalCode": "90001",
      "phoneNumber": null,
      "email": null,
      "country": "US"
    }
  ],
  "taxAddresses": [],
  "subscriptions": []
}