curl --request POST \
  --url https://api.example.com/v1/workflow-approvals/{approval_uuid}/reject \
  --header 'Content-Type: application/json' \
  --data '
{
  "responder_id": "<string>",
  "reason": "<string>"
}
'

{
  "data": {
    "uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "workflow_id": 123,
    "trigger_type": "<string>",
    "trigger_context": {},
    "reason": "<string>",
    "confidence": 123,
    "notifier_type": "<string>",
    "notifier_channel": "<string>",
    "status": "<string>",
    "responder_id": "<string>",
    "responded_at": "2023-11-07T05:31:56Z",
    "expires_at": "2023-11-07T05:31:56Z",
    "execution_result": {},
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "workflow_name": "<string>",
    "workflow_uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "trigger_agent_key_prefix": "<string>"
  },
  "meta": {}
}