curl --request POST \
  --url https://api.reply.io/v3/sequences/{id}/steps \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "type": "Email",
  "delayInMinutes": 1,
  "executionMode": "Automatic",
  "templates": [
    {
      "subject": "<string>",
      "body": "<string>",
      "isEnabled": true,
      "id": 123
    }
  ]
}
'

{
  "type": "Email",
  "delayInMinutes": 1,
  "executionMode": "Automatic",
  "templates": [
    {
      "subject": "<string>",
      "body": "<string>",
      "isEnabled": true,
      "id": 123
    }
  ],
  "id": 123
}