Extrinsic 174219-1

{
  "heartbeat": {
    "blockNumber": 174217,
    "sessionIndex": 2903,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x5aab5d7555370e005a1757d5fe4eb37c96de277d69f8f24c4db5fbad9548e21ba8cd6794ac389ac2abc81166196a8b76b59ef2fb27d0b5f21bc444b4bbad788e"
}