Extrinsic 173439-2

{
  "heartbeat": {
    "blockNumber": 173438,
    "sessionIndex": 2890,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x1c516363b743556380a0079d909593696135fbcb189a3fa5eb6a22ffce7c6e2be5d9f852bbdd0d3f63e12e4db973771b6ee331b2f31fa4f823c0841f8fbbcc8e"
}