Extrinsic 6264-1

{
  "heartbeat": {
    "blockNumber": 6263,
    "sessionIndex": 104,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x746f749d0d0201023f6d18059090fe5532638981c179dcb815e5662d41d4385e8193373c92e614dfc0aee47fed0af72dc0b5e31a6d8f3c4752418038b53e4e8c"
}