Extrinsic 172448-1

{
  "heartbeat": {
    "blockNumber": 172446,
    "sessionIndex": 2874,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x3097c61889ff8d826965c18a189c5035816b385c17d5c29baa3ba12f51944379fefc95bad9709963dce0ba2afc4c22336b0989dc838ddb18dd72d64c6cbb8b87"
}