{
  "type": "MIGRATE",
  "data": {
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    "chain": 8453,
    "token_address": "0xabc123",
    "from_pool": "0xdef456",
    "to_pool": "0x789012",
    "timestamp": 1771093397,
    "block": 42152026,
    "transaction_hash": "0x456789abcdef"
  }
}