curl --request POST \
  --url https://services.leadconnectorhq.com/opportunities/upsert \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Version: <version>' \
  --data '
{
  "pipelineId": "bCkKGpDsyPP4peuKowkG",
  "locationId": "CLu7BaljjqrEjBGKTNNe",
  "followers": "LiKJ2vnRg5ETM8Z19K7",
  "isRemoveAllFollowers": true,
  "followersActionType": "add",
  "id": "yWQobCRIhRguQtD2llvk",
  "name": "opportunity name",
  "status": "open",
  "pipelineStageId": "7915dedc-8f18-44d5-8bc3-77c04e994a10",
  "monetaryValue": 220,
  "assignedTo": "082goXVW3lIExEQPOnd3",
  "lostReasonId": "CLu7BaljjqrEjBGKTNNe"
}
'

{
  "opportunity": {},
  "new": true
}