curl --request PATCH \
  --url https://api.eflow.team/v1/networks/custom/caps \
  --header 'Content-Type: application/json' \
  --header 'X-Eflow-Api-Key: <api-key>' \
  --data '
{
  "network_custom_cap_setting_ids": [
    1,
    2,
    3
  ],
  "fields": [
    {
      "field_type": "daily_conversion_cap",
      "field_value": 150
    }
  ]
}
'

{
  "result": true
}