<｜begin▁of▁sentence｜>### Instruction:
Imagine you're working on the electrical circuitry for a new building and you've charted out a system where you've got one main circuit board, which we'll call Node 1, that branches out to several subcircuits. The connections between the circuits can be described as follows: from the main board (Node 1) we have two branches—one leading to Subcircuit 2 and another to Subcircuit 3. Subcircuit 2 further extends to two additional subpanels, labeled 4 and 5, and similarly, Subcircuit 3 extends to Subpanels 6 and 7.

Your task is to create a digital representation of this electrical branching structure for documentation purposes. Could you convert this circuit hierarchy into a standardized JSON-serializable dictionary format? This will require utilizing the NetworkX toolkit to first model the hierarchy as a directed tree, taking Node 1 as the primary source of power (the root), and then applying the `tree_data` function to output the structure. This digital blueprint should encapsulate the flow from the main circuit board to all its subsequent subcircuits.
### Response:
import networkx as nx
from networkx.readwrite import json_graph

# Create a directed graph (oriented tree)
G = nx.DiGraph()
G.add_edges_from([(1, 2), (1, 3), (2, 4), (2, 5), (3, 6), (3, 7)])

# Define the root of the tree
root = 1

# Generate tree data in a format suitable for JSON serialization
# specifying the identifiers for nodes and children
data = json_graph.tree_data(G, root=root, ident='id', children='children')

# Serialize the tree data using json
import json
serialized_data = json.dumps(data)

# Output results
print(serialized_data)
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