Cypress request failing

In code, I am calling graphql API with request having parameters fields as array of 21 objects along with image.

If fields has 15 objects, the graphql API is went through fine. But, it is more than that, network request is failing.

Below is Cypress code wrote to fire graphql call..What can I do make graphql api successful, if fields parameter has more number of objects?

 cy.intercept('/graphql', (req) => {
aliasImageUpload(req, 'sendImage')});

export const aliasImageUpload = (req, operationName) => {
  const { body } = req;
  if (body.byteLength) {
    req.alias = `gql${operationName}ImageUpload`          
  }

}