mutation SetupAccountFieldSchemaMapping($input: SetupAccountFieldSchemaMappingInput!) {
  setupAccountFieldSchemaMapping(input: $input) {
    accountFieldSchema {
      id
      source
      externalFieldId
      label
      type
      options
    }
    error {
      message
      type
      code
      fields {
        field
        message
        type
      }
    }
  }
}

{
  "input": {
    "accountFieldSchemaId": "id",
    "mapsTo": "TIER"
  }
}

{
  "data": {
    "setupAccountFieldSchemaMapping": {
      "accountFieldSchema": {
        "id": "id",
        "source": "string",
        "externalFieldId": "id",
        "label": "string",
        "type": "STRING_TYPE",
        "options": [
          "string"
        ]
      },
      "error": {
        "message": "string",
        "type": "VALIDATION",
        "code": "string",
        "fields": [
          {
            "field": "string",
            "message": "string",
            "type": "VALIDATION"
          }
        ]
      }
    }
  }
}