Extrinsic 120609-1

{
  "heartbeat": {
    "blockNumber": 120608,
    "sessionIndex": 2010,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xf4903005ec48332947a494bd98023b5533c4dc306bbd69c3b033135a4a1d58242ed7c9cde1b8f2b2a1b1d546c8f7dca134c3cd7bfb3eaa2b88439b7906558b85"
}