Extrinsic 12256-1

{
  "heartbeat": {
    "blockNumber": 12254,
    "sessionIndex": 204,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x0420a5e1a7cf2f01132377a882a726e7c37fa3867daac292ec3c1588cc9f0a38beeb0e620de002f0e7f659b12f19bac47c216aa212cfd5772229b043c4d2d582"
}