Im using bitcoinj library and blockcypher api for creating wallet and transactions on Bitcoin Testnet. I get this error when sending signed transaction.

"error": "Error validating generated transaction: Error running script for input 0 referencing 1eaf42445d037370ed5b37dd2e5a4a4f672aabb659e200d81a5f6fe9545e52d7 at 0: Script was NOT verified successfully."

So, first i create new transaction, then in reponse i get this

{
    "tx": {
        "block_height": -1,
        "block_index": -1,
        "hash": "a3d9881f64e987bf700436118da676745629b29aaec00ceee658f03a61330987",
        "addresses": [
            "mje2F5tdP5t2R5sWyPGdTD2EycbBJqKGTC",
            "mgKGQMT9TB9XjhpVZCUsSNNQV5pWF6yqSb"
        ],
        "total": 11320617,
        "fees": 4700,
        "size": 119,
        "preference": "high",
        "relayed_by": "82.117.202.34",
        "received": "2019-01-31T13:30:07.624499085Z",
        "ver": 1,
        "double_spend": false,
        "vin_sz": 1,
        "vout_sz": 2,
        "confirmations": 0,
        "inputs": [
            {
                "prev_hash": "1eaf42445d037370ed5b37dd2e5a4a4f672aabb659e200d81a5f6fe9545e52d7",
                "output_index": 0,
                "output_value": 11325317,
                "sequence": 4294967295,
                "addresses": [
                    "mje2F5tdP5t2R5sWyPGdTD2EycbBJqKGTC"
                ],
                "script_type": "pay-to-pubkey-hash",
                "age": 1453583
            }
        ],
        "outputs": [
            {
                "value": 5000,
                "script": "76a91408c24023f9172ab0042ea2bef2b077517e0b826288ac",
                "addresses": [
                    "mgKGQMT9TB9XjhpVZCUsSNNQV5pWF6yqSb"
                ],
                "script_type": "pay-to-pubkey-hash"
            },
            {
                "value": 11315617,
                "script": "76a9142d36b60f3dd37f3cca06876846a597bfdf2cf63f88ac",
                "addresses": [
                    "mje2F5tdP5t2R5sWyPGdTD2EycbBJqKGTC"
                ],
                "script_type": "pay-to-pubkey-hash"
            }
        ]
    },
    "tosign": [
        "389a2e15c404b2c2a85ce4d68101fc568f55e42df3a4c1c97fdeaa7816cee29c"
    ]
}

I take this "toSign" hash and then sign with my private key from wallet.

private fun getSignedTransactionHex(transactionToSign: String): String {
    val wallet = walletService.loadWalletFromFile("dsadasd")

    var privateKey: BigInteger? = null
    wallet.importedKeys.forEach {
        privateKey =  it.privKey
        publicKey = it.publicKeyAsHex
        System.out.println("Public key: $publicKey")
    }

    val ecKeyWif = ECKey.fromPrivate(privateKey)
    val wifAsString = ecKeyWif.getPrivateKeyAsWiF(walletService.getTestNetwork())

    val dpk = DumpedPrivateKey.fromBase58(null, wifAsString)
    val ecKey = dpk.key

    val testNet = walletService.getTestNetwork()
    val check = ecKey.getPrivateKeyAsWiF(testNet)

    val hash = Sha256Hash.wrap(transactionToSign)
    val signature = ecKey.sign(hash)

    val res = signature.encodeToDER()

    return res.toHexString()
}

Then, ill add this signed hash, my public key and "toSign" hash to transaction that i got from response earlier.

{
    "tx": {
        "block_height": -1,
        "block_index": -1,
        "hash": "a3d9881f64e987bf700436118da676745629b29aaec00ceee658f03a61330987",
        "addresses": [
            "mje2F5tdP5t2R5sWyPGdTD2EycbBJqKGTC",
            "mgKGQMT9TB9XjhpVZCUsSNNQV5pWF6yqSb"
        ],
        "total": 11320617,
        "fees": 4700,
        "size": 119,
        "preference": "high",
        "relayed_by": "82.117.202.34",
        "received": "2019-01-31T09:39:33.07827321Z",
        "ver": 1,
        "double_spend": false,
        "vin_sz": 1,
        "vout_sz": 2,
        "confirmations": 0,
        "inputs": [
            {
                "pre1v_hash": "1eaf42445d037370ed5b37dd2e5a4a4f672aabb659e200d81a5f6fe9545e52d7",
                "output_index": 0,
                "output_value": 11325317,
                "sequence": 4294967295,
                "addresses": [
                    "mje2F5tdP5t2R5sWyPGdTD2EycbBJqKGTC"
                ],
                "script_type": "pay-to-pubkey-hash",
                "age": 1453583
            }
        ],
        "outputs": [
            {
                "value": 5000,
                "script": "76a91408c24023f9172ab0042ea2bef2b077517e0b826288ac",
                "addresses": [
                    "mgKGQMT9TB9XjhpVZCUsSNNQV5pWF6yqSb"
                ],
                "script_type": "pay-to-pubkey-hash"
            },
            {
                "value": 11315617,
                "script": "76a9142d36b60f3dd37f3cca06876846a597bfdf2cf63f88ac",
                "addresses": [
                    "mje2F5tdP5t2R5sWyPGdTD2EycbBJqKGTC"
                ],
                "script_type": "pay-to-pubkey-hash"
            }
        ]
    },
    "tosign": [
        "389a2e15c404b2c2a85ce4d68101fc568f55e42df3a4c1c97fdeaa7816cee29c"
    ],
    "signatures": [
        "30440220236ab8fddb66f9ae008e17e05795ed37394e07f0f1df4325d30d03aac4fac56a02200f45f4eb9174c58d419df3d98ad045a4f21cc35b1a5912c3df63e336e7ce59c4"
    ],
    "pubkeys": [
        "0268768af434d44d700e0578bbbd89ad7100ee83f86430310fec3b7931468c1b9e"
    ]
}

Im doing something wrong probably, do you have any suggestion?