Extrinsic 4781-1

{
  "heartbeat": {
    "blockNumber": 4780,
    "sessionIndex": 79,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xb2e84d0537e36a94f07f5f687467274bd7e4d1253f28fd1fa3cafc1e834abd266c7351ddaac1472f760435ac5e3e66e149e6f6efd9e35e07b6dcd2528888d580"
}