curl --request PUT \
  --url https://wmc.wiremockapi.cloud/v1/mock-apis/{mockApiId}/mappings/{stubMappingId} \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '{
  "request": {
    "method": "GET",
    "url": "/some/thing"
  },
  "response": {
    "body": "Hello world!",
    "headers": {
      "Content-Type": "text/plain"
    },
    "status": 200
  }
}'

{
  "id": "76ada7b0-49ae-4229-91c4-396a36f18e09",
  "priority": 3,
  "request": {
    "headers": {
      "Accept": {
        "equalTo": "text/plain"
      }
    },
    "method": "GET",
    "url": "/some/thing"
  },
  "response": {
    "body": "Hello world!",
    "headers": {
      "Content-Type": "text/plain"
    },
    "status": 200
  }
}