post https://api.signeasy.com/v3/rs/bulk/sign/
Generate an embeddable link to sign multiple documents in one go
Initiate a bulk signing request for a recipient in the signing queue and generate an embeddable link to sign up to 25 documents in bulk.
Bulk signing supports all envelope signature requests with an ordered signing flow, initiated with the is_ordered property set to true. Note that, the person to bulk sign the documents must be the next one in the signing order.