Extrinsic 6261-1

{
  "heartbeat": {
    "blockNumber": 6259,
    "sessionIndex": 104,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x166c4d7a8bbaaa11e0dd70cfd86d1a4eadd2dd4b864a37c5c4cb4a14cf270168687795fe136b04508a6258cd5240c5fd131601b1b1828f94e0228626df218783"
}