post https://test-api.sygna.io/v2/bridge/transaction/permission-request
The first step of the permission request flow. Should be called by the originator VASP to inform Sygna Bridge about the creation of a compliant transaction.
The originator VASP should use its private key to construct a signature that includes the encrypted private_info and other body parameters.
The originator VASP uses its private key and the callback_url to construct the signature in callback.