Add a field to a custom object

curl --request POST \
  --url https://platform.thena.ai/v1/custom-object/{customObjectId}/fields/{fieldId} \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "fieldId": "<string>",
  "parentObjectId": "<string>",
  "relationshipType": "<string>",
  "defaultValue": "<string>"
}'

{
  "status": true,
  "message": "<string>"
}