Gov param-change

Hi there I am struggling to change the MaxDepositPeriod & MaxVotingPeriod params on a testnet… What am I doing wrong here?

{
  "title": "Deposit/Vote Time",
  "description": "This is a testnet, lets make this quicker",
  "changes": [
    {
      "subspace": "gov",
        "key": "MaxDepositPeriod",
      "value": 72800000000000
    }
  ],
  "deposit": [
    {
      "denom": "testtoken",
      "amount": "10000000"
    }
  ]
}

Check this section of the governance wiki https://github.com/gavinly/CosmosParametersWiki/blob/master/Governance.md#technical-specifications

Hi @09qw123

Thanks for this… but it still doesnt help me with any idea on how to layout the JSON…

Can you perhaps give me an example? everything I try doesnt work.