Extrinsic 55188-1

{
  "heartbeat": {
    "blockNumber": 55187,
    "sessionIndex": 919,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x865fd56bd6901b3e77bbd3e7fabb8f89b81675c7a831c2680108f5cb7cf2c30c45056ee014ddfdd68ba876e3e4f5819618fc55f021938e85d75d5bf5d01e0c84"
}