Extrinsic 19360-1

{
  "heartbeat": {
    "blockNumber": 19359,
    "sessionIndex": 322,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xaceb063677ab4392c3a86d34e1e67753acc2d4d357df7dac4b84aa4a5bab7f6640b6b29f4d3912145938517c95fb905d0e90197e8a9b033967e1b5ecddb8af8f"
}