Extrinsic 6461-1

{
  "heartbeat": {
    "blockNumber": 6460,
    "sessionIndex": 107,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xe407b942d033d962c06b53288de6a89722f919c2d23db0cce87262f4d9d56f73023aa436ed5c6d1b10572b68034bbd555c9be2949f30e8e34ef16f51bfb27885"
}