Extrinsic 151428-1

{
  "heartbeat": {
    "blockNumber": 151427,
    "sessionIndex": 2523,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x96fa8ade171007b2237a01d6a73ba274ae50986f93327306b973452662320461ec7f384552fa78aab1190d053604a72afab2bf8b1c357fb9e88df489977a298d"
}