curl --request POST \
  --url http://localhost:8080/sponsors/{sponsor_id}/deposit \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": 123,
  "gateway_ref": "<string>"
}
'

{
  "amount": {
    "value": 123
  },
  "provider_deposit_id": "<string>",
  "sponsor_id": "<string>",
  "status": "<string>",
  "gateway_ref": "<string>"
}