Extrinsic 27547-1

{
  "heartbeat": {
    "blockNumber": 27545,
    "sessionIndex": 459,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x18305034004525a8843f04281dabc3c5d7e59d2f129fbb76424501150729723700894cc9369b7e1e73c968d862f89bc6b284b2d8475d3b922f4fa66317de8c8d"
}