curl --request POST \
--url https://api.example.com/v2/signup/session \
--header 'Content-Type: application/json' \
--data '
{
"business_name": "<string>",
"user_email": "<string>",
"callback_url": "<string>",
"legal_entity_id": "<string>",
"business_information": {
"business_name": "<string>",
"business_purpose": "<string>",
"ein": "<string>",
"incorporation_date": "2023-12-25",
"naics_code": "<string>",
"futa_liability_year": "<string>"
},
"external_company_id": "<string>"
}
'