Extrinsic 17448-1

{
  "heartbeat": {
    "blockNumber": 17446,
    "sessionIndex": 290,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xa6cc1fe7b133f14379889780510d4185276162a114a515cf9c99acf9c259811d61b83aa4acc51944d197ef282baf6ebb32f866632775f75c7eeb473731df7688"
}