Reserve a file ID and receive a short-lived HTTPS PUT URL.
After the client uploads the bytes to that URL, it can reference
fileId in later API calls (e.g. Beneficiary creation KYC).
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Logical reason for the upload
kyc-id-front, kyc-id-back, kyc-selfie, kyc-id-selfie, kyb-incorporation-document, kyb-tax-certificate, kyb-address-proof, kyc-address-proof, reimbursements-proof, business-onboarding-document, contract "kyc-id-front"
MIME type that must be used in the PUT request
"image/jpeg"