curl --request PUT \
  --url https://api.closebot.com/lead/{leadId} \
  --header 'Content-Type: application/json' \
  --header 'X-CB-KEY: <api-key>' \
  --data '
{
  "fields": [
    {
      "field": "<string>",
      "value": "<string>"
    }
  ]
}
'