Send Web Request - Monday.com - Building JSON body with Monday's GraphQL

[LECarver_JC]

I am building a workflow that needs to have integration with Monday.com and I'm having trouble building the body of the web request step that I think is due to how Monday's GraphQL-based API translates into the JSON body in Workflow Manager. 

Right now I'm able to create an item in Monday and update a single column value using the send request request step in WFM.

//ITEM CREATION
{
  "query": "mutation CreateItem($board: ID!, $name: String!) { create_item(board_id: $board, item_name: $name) { id } }",
  "variables": {
    "board": "<board_id>",
    "name": Text(JobExtendedProperty($Job, 'portalsurvey', 'untitled_question_1'))
  }
}

//COLUMN UPDATE
{
  "query": "mutation ChangeStatus($board: ID!, $item: ID!, $col: String!, $val: String!) { change_simple_column_value(board_id: $board, item_id: $item, column_id: $col, value: $val) { id } }",
  "variables": {
    "board": "<board_id>",
    "item": JobOutputValue ($Job, '<step_id>', '<output value from create item step>'),
    "col": "<column_id>",
    "val": "Working on it"
  }
}

However, technically, I should be able to give a new item values or update multiple values per Monday.com's documentation.

//CREATING A NEW ITEM EXAMPLE
mutation {
  create_item(
    board_id: 1234567890
    group_id: "group_one" 
    item_name: "new item" 
    column_values: "{\"date\":\"2023-05-25\"}"
	) {
    id
  }
}

//UPDATING MULTIPLE COLUMNS EXAMPLE
mutation {
  change_multiple_column_values(
    item_id: 1234567890,
    board_id: 9876543210,
    column_values: "{\"status\":{\"index\":1},\"date4\":{\"date\":\"2021-01-01\"},\"person\":{\"personsAndTeams\":[{\"id\":9603417,\"kind\":\"person\"}]}}"
  ) {
    id
  }
}

In Workflow Manager, I've tried the following:

1. Writing the query with values inline, such as:

"query": "mutation { create_item(board_id: <board_id>, item_name: \"@{Text(JobExtendedProperty($Job, 'portalsurvey', 'untitled_question_1'))}\", column_values: \"{\\\"<column_id>\\\":\\\"hello\\\"}\") { id } }"

2. Writing it with variables as I did in my working versions. I tried having the column values variables as JSON! and STRING!

{ 
"query": "mutation CreateItem($board: ID!, $name: String!, $col: JSON!) { create_item(board_id: $board, item_name: $name, column_values: $col) { id } }", 
"variables": { 
"board": "<board_id>", 
"name": "<item_name>", 
"col": "{\"<column_id>\":\"hello\"}" 
} 
}

Both of these are resulting in errors from WFM saying that 'Web request failed: Web request body is not valid JSON', 'Unable to Parse JSON', and 'Step failed with error: InvalidArguments'.

I'm fairly confident that I have the overall syntax correct because when I test the two above web requests in Postman, they work just fine, but it fails when it's in Workflow Manager. 

Any troubleshooting suggestions or advice is much appreciated!