Requesting an example of mutation operation

[arvindpdmn]

Current examples cover query operation. For beginners like me it will be helpful to have a mutation example. Specifically, I tried a few things but getting this error: Error: Failed to start application: Key (query) not found in array and no default was provided.

I gave the following POST request:

POST /api/ HTTP/1.1
Host: localhost
Accept: application/json
Content-Type: application/json
Cache-Control: no-cache
{"mutation":"{ createAcronym({name: 'xxx', description: 'yyy'}) {Acronym {id, name}} }"}

My schema:

input Acronym {
    name: String!
    description: String!
}

type Mutation {
  createAcronym(input: Acronym): Int
}

[arvindpdmn]

I found a mutation example here: https://siler.leocavalcante.dev/graphql

[arvindpdmn]

I figured out the correct syntax: {"query":"mutation { createAcronym(input: {name:\"ABC\", description:\"Abstract Base Class\"}) }"}