Extrinsic 28360-1

{
  "heartbeat": {
    "blockNumber": 28359,
    "sessionIndex": 472,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x70a89f5331de52f3b9a565bfce07de844ef6ee5472e78b77abad2289687ccf11649b0e320b5a0f4bc0100c1aa478fc28d625be19982c442b324565f05536c08f"
}