post https://demo.signalwire.com/api/relay/rest/registry/beta/brands//campaigns
A Campaign belongs to a Brand.
To create a new managed campaign, send a POST request to the Campaign resource with all of the parameters except for csp_campaign_reference.
To create a new self-registered campaign, send a POST request to the same Campaign resource except that you only need to fill out the name and csp_campaign_reference parameters.
Please note: the csp_self_registered parameter has been deprecated and is no longer required.