how to add integer field in array

[vakilev]

[
{
"operation": "shift",
"spec": {
"ts": "msgTs",
"pk": {
"id": "muMesId",
"systemCode": "mesId"
},
"op": "materialStatusName",
"data": {
"workshopCode": "kcehId",
"werks": "werksId",
"primeId": "primeId",
"markingAcc": {
"nplv": "markingAcc.nplv",
"strand": "markingAcc.strand",
"slab": "markingAcc.slab"
},
"specifications": {
"": {
"specCode": "additionalParamsDtos[#2].code",
"specName": "additionalParamsDtos[#2].name",
"specTypeCode": "additionalParamsDtos[#2].type",
"specValue": "additionalParamsDtos[#2].value",
"specFormat": "additionalParamsDtos[#2].format",
"specMeasure": "additionalParamsDtos[#2].unitOfMeasure"
}
},
"macrostructure": {
"": {
"requestRowId": "macrostructure[&1].requestRowId",
"sampleNum": "macrostructure[&1].sampleNum",
"sampleType": "macrostructure[&1].sampleType",
"probeCode": "macrostructure[&1].probeCode",
"distributionType": "macrostructure[&1].distributionType",
"specifications": {
"": {
"specCode": "macrostructure[&3].additionalParamsDtos[&1].code",
"specName": "macrostructure[&3].additionalParamsDtos[&1].name",
"specTypeCode": "macrostructure[&3].additionalParamsDtos[&1].type",
"specValue": "macrostructure[&3].additionalParamsDtos[&1].value",
"specFormat": "macrostructure[&3].additionalParamsDtos[&1].format",
"specMeasure": "macrostructure[&3].additionalParamsDtos[&1].unitOfMeasure"
}
}
}
},
"chemData": {
"": {
"sampleId": "chemData[&1].sampleId",
"probeCode": "chemData[&1].probeCode",
"analysisCode": "chemData[&1].analysisCode",
"sampleNum": "chemData[&1].sampleNum",
"chemical": {
"*": {
"chemCode": "chemData[&3].additionalParamsDtos[&1].code",
"chemName": "chemData[&3].additionalParamsDtos[&1].name",
"#2": "chemData[&3].additionalParamsDtos[&1].type",
"chemValue": "chemData[&3].additionalParamsDtos[&1].value",
"chemFormat": "chemData[&3].additionalParamsDtos[&1].format",
"chemMeasure": "chemData[&3].additionalParamsDtos[&1].unitOfMeasure"
}
}
}
}
}
}
}
]

look, this "#2": "chemData[&3].additionalParamsDtos[&1].type" adds field "2",
but i need this to be 2 (int). How am i supposed to to this?