curl --request POST \
  --url 'http://localhost:7575/v2/commands/command-completions' \
  --header 'Authorization: Bearer $TOKEN' \
  --header 'Content-Type: application/json' \
  --data '{"parties":["string"],"beginExclusive":0}'

[
  {
    "completionResponse": {}
  }
]

{
  "code": "string",
  "cause": "string",
  "correlationId": "string",
  "traceId": "string",
  "context": {},
  "resources": [
    [
      "string"
    ]
  ],
  "errorCategory": 0,
  "grpcCodeValue": 0,
  "retryInfo": "string",
  "definiteAnswer": false
}