[nctl-auction-undelegate]

**Describe the bug**
Command gives parse error and os error 32.

**To Reproduce**
Steps to reproduce:
1. Run `nctl-auction-undelegate.`
2. See error

**Expected behavior**
Command above expected to run successfully after following the setup and usage instructions given in repo.

**Environment:**
- OS: Ubuntu 24.04
- Python version: 3.12.3
- casper-nctl commit: [https://github.com/casper-network/casper-nctl/commit/ec9f9e768c9f0d87da13544023f8118fb31fa924]
- casper-node version: 2.0.0

**Error output**
```
(jq: parse error: Invalid numeric literal at line 2, column 37))
```

**Additional context**
Any other relevant information.