How to create custom source type to add metadata fields to each row and parse an array?

[maayan]

Hi,

following ticket: https://community.splunk.com/t5/Splunk-Search/Join-all-objects-with-specific-object-within-the-same-...

I have a JSON file (key-val structure). I need to create a source type in Splunk enterprise website(I don't have access to the config files). 

Each file include one array called Payloads and metadata header. Payloads includes events. each event has Header+Payload. 
i need to parse the json so each row represent one event and meta data fields will be added to each row.
(metadata fields values are the same for all events in one file).

Example for json:
{
"MetaData": {
"HostName": "host name"
},
"Payloads": [
{
"Header": {
"Type": "Event 1",
"Name": "event name 1",
"TimeStamp": 133299573877857753
},
"Payload": {
"Scan Start Timestamp": 133299573845207001,
"Scan Complete Timestamp": 133299573877857728
}
},
{
"Header": {
"Type": "Event 2",
"Name": "event name 2",
"TimeStamp": 133207765527670215
},
"Payload": {
"MAC Address": "A7",
"Information": {
"APM": "blabla"
},
"CT": "bla",
"LInformation": [
{
"ID": 1
}
],
"CE Parameters": {
"AR Timestamp": 133207765527630372,
"AsR Frame": [ 0, 0, 48, 0, 74, 0 ]
}
}
}
]
}

which definitions should i use in edit source type?

thanks