Empty Result
{ "type": "create_contribution", "params": { "id": "4", "from": "4my.lexdev.testnet", "to": "lexdev.testnet", "proposal_id": "2", "amount": "500000000000000000000000" }}
{
"type": "create_contribution",
"params": {
"id": "4",
"from": "4my.lexdev.testnet",
"to": "lexdev.testnet",
"proposal_id": "2",
"amount": "500000000000000000000000"
}