Extrinsic 57672-1

{
  "heartbeat": {
    "blockNumber": 57671,
    "sessionIndex": 961,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xd8af79af48880b88bcc68801f2ffe06af2504fdcddb8cac1cdfa627f5d8235546aef3dcdd19eb4229ed4e0de084c4fca690a243217a429dd3c2b4c61f5f0b186"
}