curl --request POST \
  --url https://api.coverwhale.dev/v1/submission/{displayId}/{transactionId}/trailer \
  --header 'AccessToken: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "vehicle_id_number": "<string>",
  "year": 2020,
  "make": "GREAT DANE",
  "model": "FREEDOM",
  "value": 25000,
  "body_type": "<string>",
  "deductible": 123
}
'

{
  "status": "success",
  "trailer_id": 123,
  "submission_number": "<string>",
  "transaction_id": 123
}