put https://api.followupboss.com/v1/deals/
Update a deal.
Deals Custom Fields
Any custom fields that have been created can also have their values updated via this method. For instance, if you had a custom field called "customField1", you could pass that in as an argument with an associated value in the body parameters for the POST request.
You can see how this would appear with multiple custom fields in the sample response object.