Extrinsic 7648-1

{
  "heartbeat": {
    "blockNumber": 7647,
    "sessionIndex": 127,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x2e88170cba13aafbcda64047c874424b2c7bc71565abf023180c7fe4b6ed7c67fbaef7c98359df1ce31cec3bd4a58277c47bbf9a30e6fac2f96efc4e88081587"
}