Block details.
Epoch: 91 Number of transactions in block: 1 slot_no: 1969758 epoch_slot_no: 4158 block_no: 1968276 slot_leader_id: 7 size: 1395 time: 2018-12-23 20:50:51 proto_major: 0 proto_minor: 2 hash: \x4640a99bbdf6bdf32de795119181beaeac67508759e2d6e789f49b4002c7898eBlock Operator
vrf_key: op_cert: op_cert_counter: