curl --request POST \
  --url https://api.example.com/v1/sales/leads/bulk_action/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "stage": 123,
  "action": "move",
  "stage_move": 123,
  "message": "<string>"
}
'

{
  "stage": 123,
  "action": "move",
  "stage_move": 123,
  "message": "<string>"
}