Crashes with escaped quotes

[barucAlmaguer]

The parser crashes when I pass a query like this one:

{
  queues(filter: {name: "MOVE_LOTS"}) {
    name
    jobs(
      filter: {
        input: {contains: "{\"toResource\": \"UNCASTING_1\"}"}
      }
      orderBy: {desc: ID},
      limit: 10
    ) {
      id
      insertedAt
      queue {
        id
        name
      }
      jobStatus
      input
      context
      output
    }
  }
}

the line #7 fails with this stack trace:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/baruc/.local/share/virtualenvs/pygqlc-8iu9ltOc/lib/python3.10/site-packages/graphql/parser.py", line 36, in parse
    return self.yacc.parse(input=input, lexer=lexer, **kwargs)
  File "/Users/baruc/.local/share/virtualenvs/pygqlc-8iu9ltOc/lib/python3.10/site-packages/ply/yacc.py", line 333, in parse
    return self.parseopt_notrack(input, lexer, debug, tracking, tokenfunc)
  File "/Users/baruc/.local/share/virtualenvs/pygqlc-8iu9ltOc/lib/python3.10/site-packages/ply/yacc.py", line 1201, in parseopt_notrack
    tok = call_errorfunc(self.errorfunc, errtoken, self)
  File "/Users/baruc/.local/share/virtualenvs/pygqlc-8iu9ltOc/lib/python3.10/site-packages/ply/yacc.py", line 192, in call_errorfunc
    r = errorfunc(token)
  File "/Users/baruc/.local/share/virtualenvs/pygqlc-8iu9ltOc/lib/python3.10/site-packages/graphql/parser.py", line 647, in p_error
    self.raise_syntax_error(
  File "/Users/baruc/.local/share/virtualenvs/pygqlc-8iu9ltOc/lib/python3.10/site-packages/graphql/parser.py", line 660, in raise_syntax_error
    raise SyntaxError(
graphql.exceptions.SyntaxError: Line 7: Syntax error at ': '

[barucAlmaguer]

but it's valid graphQL, the query is a valid one that I have used without problems