Extrinsic 6761-1

{
  "heartbeat": {
    "blockNumber": 6759,
    "sessionIndex": 112,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xc65e03bb3978496fbaf6176a257b2d40b21c3640816d411ea201949823fadd1e29e0702b058b9c531ff2d4aa7fed06910e3fa0a2e44b0c21172019a9bdf7fd81"
}