Extrinsic 9307-1

{
  "heartbeat": {
    "blockNumber": 9306,
    "sessionIndex": 155,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x74dfe77c79817d23fe3c64ec5519693755425521692004a5bb57412fb5bf4b21a7150da1a52fb615fd94fcbcf4dd088838c95881709f3a6ab4036165ad38ef84"
}