post https://api-sandbox.pismolabs.io/pix-dict/v1/pix/keys/validate
Validates a key locally (if we hold the ownership of it) or directly in DICT (if it is an external key) and then returns the related information of it along with the endToEndId that will be used to start a Pix transaction. Be aware that all consultations to this endpoint should be made with the sole and exclusive purpose of initiating payments and it has a mandatory validation to trace who is doing the key validation.