Extrinsic 51997-1

{
  "heartbeat": {
    "blockNumber": 51996,
    "sessionIndex": 866,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xd2f964e4114584ed474008030250de391ab171dfa725664abb27eab063932c3237cfdc4de0c24fee7cd8e866f1035fe941eda9ef02a726e402e95d08d1f84886"
}