curl --request POST \
  --url https://api.kakiyo.com/v1/prospects/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "campaignId": "campaign_12345abcde",
  "prospects": [
    {
      "name": "John Smith",
      "url": "https://linkedin.com/in/johnsmith",
      "additionalFields": [
        {
          "fieldName": "company",
          "fieldValue": "Acme Inc"
        }
      ]
    }
  ]
}'

{
  "message": "3 prospects added successfully"
}