import requests

url = "https://api.pagerduty.com/incident_workflows/id"

payload = { "incident_workflow": {
        "name": "Example Incident Workflow",
        "description": "This Incident Workflow is an example",
        "steps": [
            {
                "name": "Send Status Update",
                "action_configuration": {
                    "action_id": "pagerduty.com:incident-workflows:send-status-update:1",
                }
            }
        ]
    } }
headers = {
    "Accept": "application/json",
    "Content-Type": "application/json",
    "Authorization": "Token token=---------"
}

response = requests.put(url, json=payload, headers=headers)

print(response.json())

> {'message': 'Invalid body: "incident_workflow.steps[0].action_configuration.inputs" is required'}