Create a new advertiser

curl --request POST \
  --url https://api.topsort.com/public/v1/offsite-ads/advertisers \
  --header 'Content-Type: application/json' \
  --data '{
  "dsp": "google_ads",
  "vendorId": "<string>"
}'

{
  "jobId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}