curl --request POST \
  --url 'https://actionkit.useparagon.com/projects/{project_id}/actions/#QUICKBOOKS_UPDATE_CUSTOMER' \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "action": "QUICKBOOKS_UPDATE_CUSTOMER",
  "parameters": {
    "updateCustomerId": "<string>",
    "givenName": "<string>",
    "familyName": "<string>",
    "displayName": "<string>",
    "email": "<string>",
    "phoneNumber": "<string>",
    "billingAddressLine1": "<string>",
    "billingAddressLine2": "<string>",
    "billingCity": "<string>",
    "billingStateSubdivisionCode": "<string>",
    "billingCountry": "<string>",
    "billingPostalCode": "<string>",
    "syncToken": "<string>"
  }
}'