Extrinsic 173505-1

{
  "heartbeat": {
    "blockNumber": 173504,
    "sessionIndex": 2891,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x14d338f13d2ce491b4fad900f82747869602b789c058dc8e66871a7b7ced242b82205c35ae80d3377f07252614d3066e08251c9032174b229d632b2cd7e67c8e"
}