Add an administrator to a Tenant

curl --request POST \
  --url https://platform.realto.io/api/v1/tenants/{tenantId}/administrators \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}'

{
  "administrators": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ],
  "entities": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ],
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>"
}