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{
  "name": "armexisting",
  "base": "",
  "fields": [
    {
      "name": "arm",
      "type": "float64"
    },
    {
      "name": "position_id",
      "type": "uint64"
    },
    {
      "name": "user_acc",
      "type": "name"
    },
    {
      "name": "backend",
      "type": "string"
    }
  ]
}