Extrinsic 2226-1

{
  "heartbeat": {
    "blockNumber": 2225,
    "sessionIndex": 37,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x2a220a291900c98d285d5199290e6472e6920f9791d9a54d88748cb192e4f522b54bb0da8f61281b29d73d41aafe53c6b223f06b9247cb9a12891bcd9c190f80"
}