{ "rules_set_stock_value" : {
    "LABEL" : "Set Stock Value",
    "PLUGIN" : "rule",
    "REQUIRES" : [ "rules" ],
    "USES VARIABLES" : {
      "product" : { "label" : "Product", "type" : "commerce_product" },
      "new_stock_value" : { "label" : "New Stock Value", "type" : "integer" }
    },
    "IF" : [
      { "entity_has_field" : { "entity" : [ "product" ], "field" : "commerce_stock" } }
    ],
    "DO" : [
      { "data_set" : { "data" : [ "product:commerce-stock" ], "value" : [ "new-stock-value" ] } }
    ]
  }
}