curl --request PUT \
  --url https://realtime-api.voiceflow.com/v1/stable/environment/merge \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "sourceEnvironmentAlias": "<string>",
  "targetEnvironmentAlias": "<string>",
  "removeSourceEnvironment": false
}
'

{
  "sourceEnvironment": {
    "name": "<string>",
    "alias": "<string>",
    "isMain": true,
    "releases": [
      {
        "name": "<string>",
        "backupID": 123,
        "createdAt": "2023-11-07T05:31:56Z",
        "description": "<string>",
        "autogenerated": true
      }
    ],
    "createdAt": "2023-11-07T05:31:56Z",
    "trafficPercentage": 123
  },
  "targetEnvironment": {
    "name": "<string>",
    "alias": "<string>",
    "isMain": true,
    "releases": [
      {
        "name": "<string>",
        "backupID": 123,
        "createdAt": "2023-11-07T05:31:56Z",
        "description": "<string>",
        "autogenerated": true
      }
    ],
    "createdAt": "2023-11-07T05:31:56Z",
    "trafficPercentage": 123
  },
  "targetRelease": {
    "name": "<string>",
    "backupID": 123,
    "createdAt": "2023-11-07T05:31:56Z",
    "description": "<string>",
    "autogenerated": true
  }
}