Extrinsic 51312-1

{
  "heartbeat": {
    "blockNumber": 51311,
    "sessionIndex": 855,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x9aa6974f200a44f4470354a0a44ad0d86bf186a5b6e2abf30eb5ee804ea4ea2a5dcb016a165534dff16323e7184396999c7783229385f117d1011ca8c27bf087"
}