curl --request POST \
  --url https://api.example.com/api/economic/v1/get-fred-series-batch \
  --header 'Content-Type: application/json' \
  --data '
{
  "seriesIds": [
    "<string>"
  ],
  "limit": 123
}
'

{
  "results": {},
  "fetched": 123,
  "requested": 123
}