Got "gas" is missing error when trying to run a node.js script using web3.js to interact with smart contract function

Question

I am trying to use Web3.js to claim a token from a Smart Contract. I am meeting the error return new Error('"gas" is missing');.

const Web3 = require('Web3');
const OptimizedTransparentUpgradeableProxy = require('./config')
var url = "https://api.avax.network/ext/bc/C/rpc";
var web3 = new Web3(url)

// ENTER PUBLIC AND PRIVATE KEY HERE
var address = '';
var private_key = '';

var address = '0x5857019c749147EEE22b1Fe63500F237F3c1B692'
var abi = ''
var contract = new web3.eth.Contract(abi, address)

var claimable = contract.methods.claimable(address).call();
//console.log("Total amount: " + claimable);
contract.methods.claimable(address).call().then(claimable => {
    console.log(claimable)
})
var nonce = web3.eth.getTransactionCount(address);
var claim = contract.methods.claim();

const signed_txn = web3.eth.accounts.signTransaction(
    claim, private_key = private_key
);
console.log("signed_txn")
console.log(signed_txn)

const gasPrice = web3.eth.getGasPrice();
const gasEstimate = contract.methods.claim().estimateGas({ from: address });

console.log("Sending Claim");
contract.methods.claim().send({from: address, gasPrice: gasPrice, gas: gasEstimate});
console.log("Sent")

const tx_token = web3.eth.sendSignedTransaction(signed_txn.rawTransaction);
//console.log("LP claimed: " + web3.utils.toHex(tx_token))



// var check = true;   

// var claim = contract.methods.claim().buildTransaction({
//     'from': address,
//     //'gasPrice': web3.toWei('50', 'gwei'),
//     'nonce': nonce,
// })



// var signed_txn = web3.eth.account.sign_transaction(claim, private_key = private_key)
// var tx_token = web3.eth.send_raw_transaction(signed_txn.rawTransaction)
// console.log("LP claimed: " + web3.toHex(tx_token))

I've already followed the steps as outlined here https://ethereum.stackexchange.com/questions/65695/unhandledpromiserejectionwarning-error-gas-is-missing but I can't seem to get the code to work. I am trying to mimic a web3.py program that i wrote which does what i intend to. The working python version is here:

from web3 import Web3
from config import *

# Connection to RPC Node
avax = "https://api.avax.network/ext/bc/C/rpc"
web3 = Web3(Web3.HTTPProvider(avax))
print(web3.isConnected())

# ENTER PUBLIC AND PRIVATE KEY HERE
address = web3.toChecksumAddress('')
private = ''

contract = web3.eth.contract(OptimizedTransparentUpgradeableProxy.ContractAddress, abi = OptimizedTransparentUpgradeableProxy.abi)
print(contract)

claimable = contract.functions.claimable(address).call()
print("Total amount", claimable)

nonce = web3.eth.get_transaction_count(address)
check = True

claim = contract.functions.claim().buildTransaction({
        'from': address,
        'gasPrice': web3.toWei('50', 'gwei'),
        'nonce': nonce,
    })

# try:
#     claim = contract.functions.claim().buildTransaction({
#         'from': address,
#         'gasPrice': web3.toWei('50', 'gwei'),
#         'nonce': nonce,
#     })
# except:
#     print("Transaction did not go through.")
#     exit()


signed_txn = web3.eth.account.sign_transaction(claim, private_key=private)
tx_token = web3.eth.send_raw_transaction(signed_txn.rawTransaction)
print("LP claimed: " + web3.toHex(tx_token))