curl --request POST \
  --url 'https://api.nsr.stateset.com/api/v1/types/predicates' \
  --header 'X-API-Key: YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "arg_types": [
    "entity",
    "location"
  ],
  "doc": "Entity X lived in location Y",
  "name": "lived_in"
}'

{
  "arg_types": [
    "string"
  ],
  "arity": 1,
  "doc": "string",
  "name": "string",
  "return_type": "string"
}