how to extract a variable from JSON Body Data which I am sending in the Http POST request

I have a POST HTTP request

{
    "data": {
        "sipPort": 0,
        "workGroupId": 0,
        "capabilities": [{
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$StandardAgent",
            "ordinal": 1,
            "value": "STANDARDAGENT"
        }],
        "statusReason": 0,
        "connectionList": [{
            "interactionId": "${interactionId}",
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$Connection",
            "media": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$UnknownMediaType",
                "ordinal": 0,
                "value": "INVALID"
            },
            "serviceId": ${worktype},
            "interactionType": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$InteractionTypeUnavailable",
                "ordinal": 0,
                "value": "CallTypeUnavailable"
            },
            "involvedParty": {
                "name": "${sfid}",
                "ldapname": "${user}@${organization}.com",
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$InvolvedParty",
                "id": 228,
                "stationAddress": "8005"
            },
            "connectionType": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$Interaction",
                "ordinal": 1,
                "value": "INTERACTION"
            }
        }],
        "ctiId": 24,
        "domainTenantInfo": {
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$DomainTenant",
            "tenantId": 1
        },
        "mailBox": "${user}@${organization}.com",
        "resourceGroupId": 0,
        "$clazz": "hubchannel.catalog.ContactCenterCatalog$InvolvedPartyLoggedInEvent",
        "switchId": 127,
        "eventTimeStamp": "${__time(yyyy-MM-dd'T'HH:mm:ssX)}",
        "involvedEventSequenceNumber": 1,
        "serviceStates": [{
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$ServiceInfo",
            "serviceId": ${worktype},
            "serviceState": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$Active",
                "ordinal": 1,
                "value": "ACTIVE"
            }
        }, {
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$ServiceInfo",
            "serviceId": ${worktype},
            "serviceState": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$Active",
                "ordinal": 1,
                "value": "ACTIVE"
            }
        }, {
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$ServiceInfo",
            "serviceId": ${worktype},
            "serviceState": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$Active",
                "ordinal": 1,
                "value": "ACTIVE"
            }
        }, {
            "$clazz": "hubchannel.catalog.ContactCenterCatalog$ServiceInfo",
            "serviceId": ${worktype},
            "serviceState": {
                "$clazz": "hubchannel.catalog.ContactCenterCatalog$Active",d(kV$*=i2VGOq5OxN5PI4%36OQwOM&eD
                "ordinal": 1,
                "value": "ACTIVE"
            }
        }],
        "circuitId": 1,
        "sipIpAddress": "",
        "siteId": 1,
        "eventSequenceNumber": 0,
        "channelId": 1
    }
}

I want to extract eventSequenceNumber from this body and use it in the next HTTP POST request after increment it by 1.