Extrinsic 11964-1

{
  "heartbeat": {
    "blockNumber": 11962,
    "sessionIndex": 199,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x2219ac68442b17ea47601a0fec672625d52cbed53d02da092c9dfaf4ac9bba2380ab2f4cb0d87f56516b442d06d071ec5f1b464a6b67759775fc849838b7708f"
}