Create operation with Xrm.WebApi.online.execute

xrm-webapi-online-execute-create.js

var Sdk = window.Sdk || {};

/**
 * Request to create a record
 * @param {string} entityTypeName - The entity type name.
 * @param {Object} payload - The entity payload.
 */
Sdk.CreateRequest = function (entityTypeName, payload) {
    this.etn = entityTypeName;
    this.payload = payload;
    this.getMetadata = function () {
        return {
            boundParameter: null,
            parameterTypes: {},
            operationType: 2,
            operationName: "Create",
        };
    };
};

// Construct a request object from the metadata
var request = new Sdk.CreateRequest("new_entity", { "new_name": "Foo Bar" });

// Use the request object to execute the function
Xrm.WebApi.online.execute(request).then(
    (result) => {
        if (result.ok) {
            console.log(`${result.status} ${result.statusText}`);
        }
    },
    (error) => {
        console.log(error.message);
    }
);