Create a token type

curl --request POST \
  --url https://protocol-sandbox.lumx.io/v2/contracts/{contractId}/token-types \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "description": "<string>",
  "maxSupply": 123,
  "traits": {},
  "imageUrl": "<string>"
}'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "uriNumber": 123,
  "contractId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "description": "<string>",
  "maxSupply": 123,
  "currentSupply": 123,
  "traits": {
    "trait1_name": "trait1_value",
    "trait2_name": "trait2_value",
    "trait3_name": "trait3_value"
  },
  "imageUrl": "<string>",
  "metadataUrl": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z"
}