Send signed transaction in JSON format through RPC meets error.

[OstNo1]

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Describe your question in detail.

I send a request of the following JSON body to bocast a transaction through RPC : https://api.mainnet.aptoslabs.com/v1/transactions POST, but got an error: Failed to parse transaction payload: parse arguments[0] failed, expect string<move_struct_tag_id>, caused by error: invalid type: map, expected a string. I think this JSON arguments[0] is correct according to the address 0x4bf51972879e3b95c4781a5cdcb9e1ee24ef483e7d22f2d903626f126df62bd1 ABI on chain, please help to check what is wrong with it, thx.
{ "sender": "my address", "sequence_number": "84", "max_gas_amount": "100000", "gas_unit_price": "100", "expiration_timestamp_secs": "1725370236", "payload": { "type": "entry_function_payload", "function": "0x4bf51972879e3b95c4781a5cdcb9e1ee24ef483e7d22f2d903626f126df62bd1::router::add_liquidity_and_stake_coin_entry", "type_arguments": [ "0x1::aptos_coin::AptosCoin" ], "arguments": [ { "inner": "0x2ebb2ccac5e027a87fa0e2e5f656a3a4238d6a48d93ec9b610d570fc0aa0df12" }, false, "1308296", "199999885" ] }, "signature": { "type": "ed25519_signature", "public_key": "my public key", "signature": "my signature" } }

What error, if any, are you getting?

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What have you tried or looked at? Or how can we reproduce the error?

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Which operating system are you using?

Windows

Which SDK or tool are you using? (if any)

REST API

Describe your environment or tooling in detail

No response

[0xmaayan]

The arguments property should be an array of strings and not a json. Try sending the address as a string

arguments:["0x123...789"]

[OstNo1]

Thanks for reaching out. But I wonder why this is a String not a map {"inner": "xxxx"}, I got other successful transaction request data(the follow data), the main difference is the arg type according to the contract on chain: failed one is : 0x1::object::Object<0x1::fungible_asset::Metadata> , success one is : vector<0x1::object::Object<0x1::fungible_asset::Metadata>>

successful transaction data:
{ "sender": "my address", "sequence_number": "79", "max_gas_amount": "100000", "gas_unit_price": "100", "expiration_timestamp_secs": "1725359226", "payload": { "type": "entry_function_payload", "function": "0x4bf51972879e3b95c4781a5cdcb9e1ee24ef483e7d22f2d903626f126df62bd1::router::swap_route_entry_from_coin", "type_arguments": [ "0x1::aptos_coin::AptosCoin" ], "arguments": [ "10000000", "1490574843", [ { "inner": "0xbeccb00e5082bc3ef9f20e08d46edab77f7b1c7bfc8a21d066a4269abd825843" }, { "inner": "0x2ebb2ccac5e027a87fa0e2e5f656a3a4238d6a48d93ec9b610d570fc0aa0df12" } ], [ false, false ], "my address" ] }, "signature": { "type": "ed25519_signature", "public_key": "my public key", "signature": "my signature" } }