token: ********************{
"name": "string",
"description": "string",
"regex": "string",
"order": 0,
"value": null
}curl --location --request PUT '/admin/servers//customfields/' \
--header 'token: <api-key>' \
--header 'Content-Type: application/json' \
--data '{
"name": "string",
"description": "string",
"regex": "string",
"order": 0,
"value": null
}'{
"success": true
}