1[
2  {
3    "cirq_type": "MeasurementGate",
4    "num_qubits": 3,
5    "key": "z",
6    "invert_mask": []
7  },
8  {
9    "cirq_type": "MeasurementGate",
10    "num_qubits": 3,
11    "key": "z",
12    "invert_mask": [
13      true,
14      false,
15      true
16    ]
17  },
18  {
19    "cirq_type": "MeasurementGate",
20    "num_qubits": 3,
21    "key": "a:b:z",
22    "invert_mask": [
23      true,
24      false
25    ],
26    "qid_shape": [
27      1,
28      2,
29      3
30    ]
31  }
32]