Extrinsic 7931-1

{
  "heartbeat": {
    "blockNumber": 7930,
    "sessionIndex": 132,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x280a07e072686f9c971695ff6eef2dfa34fbdf341a1d29fcf58fd318581a9c1ab8a899307b1f849aa04b17e46489519e59dece4e6c69ec2d78cb892d529ca88f"
}