balance: QUANTITY - The balance to set for the account before executing the call.
nonce: QUANTITY - The nonce to set for the account before executing the call.
code: DATA - The EVM bytecode to set for the account before executing the call.
state*: OBJECT - Key-value mapping of storage slot to value that will clear all slots and then override individual slots in the account storage before executing the call.
stateDiff*: OBJECT - Key-value mapping of storage slot to value that will override individual slots in the account storage before executing the call.
*Note - stateDiff is either applied to state or existing state

{
  "0xd9c9cd5f6779558b6e0ed4e6acf6b1947e7fa1f3": { 
    "nonce": "0xa", 
    "balance": "0xffff", 
    "state": { 
      "0000000000000000000000000000000000000000000000000000000000000001": "0xbaddad42baddad42baddad42baddad42baddad42baddad42baddad42baddad42"
    } 
  },
  "0xebe8efa441b9302a0d7eaecc277c09d20d684540": { 
    "code": "0x123456", 
    "stateDiff": {
      "0000000000000000000000000000000000000000000000000000000000000002": "0xbaddad42baddad42baddad42baddad42baddad42baddad42baddad42baddad42"
    } 
  }
}