curl --location 'https://api.sandbox.supersign.com.br/v4/api/envelopes/' \
--header 'Idempotency-Key: 7d3f1c52-9a4b-4e6d-8f20-5b1c9e3a7d41' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
"title": "Contrato de prestação de serviços"
}'{
"envelopeId": "string"
}