I have this smart contract:

pragma solidity 0.5;
pragma experimental ABIEncoderV2;
contract TestStruct {

      struct User {
        string name;
        uint256 age;

    mapping (bytes32 => User) users;

    function addUsers (User [] memory _users) public {

        for (uint i = 0; i < _users.length; i++) {

           bytes32 hash = keccak256(abi.encode(_users[i].name));
           users[hash] = _users[i];


    function getUser (string memory username) public view returns (User memory) {

        bytes32 hash = keccak256(abi.encode(username));

        return users[hash];

I want to test it using remix IDE, But I didn't find the write way to pass the array of struct in remix UI

I try this enter image description here

And I got this error:

transact to TestStruct.addUsers errored: Error encoding arguments: SyntaxError: JSON.parse: expected property name or '}' at line 1 column 4 of the JSON data  

Your function takes an array of structures as an argument:

enter image description here

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