How do EDI to JSON Translations work?

First, here's a quick look at an EDI claim status report:

https://apigw.changehealthcare.com/medicalnetwork/reports/v1/X3000000.XX

{
    "report_content": "ISA~00~          ~00~          ~ZZ~CLAIMSCH       ~ZZ~010414         ~180511~1112~|~00501~100321569~0~P~^_TA1~020120501~131121~1506~A~000_GS~FA~ECGCLAIMS~K10353~20180511~1112~000000001~X~005010X231A1_ST~999~0001~005010X231A1_AK1~HC~1~005010X223A1_AK2~837~00704~005010X223A1_IK5~A_AK9~A~000001~000001~000001_SE~0000000006~0001_GE~000001~000000001_IEA~00001~100321569_"
}

You append the /277 suffix to the same path, and the API renders the translation:

https://apigw.changehealthcare.com/medicalnetwork/reports/v1/X3000000.XX/277

{
    "claims": [
        {
            "claimStatus": {
                "effectiveDate": "20200107",
                "entity": "Mutually Defined",
                "entityCode": "ZZ",
                "statusCategoryCode": "E1",
                "statusCategoryCodeValue": "Response not possible - System Status",
                "statusCode": "689",
                "statusCodeValue": "Entity was unable to respond within the expected time frame. Usage: This code requires use of an Entity Code.",
                "trackingNumber": "ABCD"
            }
        }
...

Here's an example of a 1:1 translation from EDI to JSON, starting with getting a display of an EDI-formatted Remittance file:

GET

https://apigw.changehealthcare.com/medicalnetwork/reports/v1/R5000000.XX

{
    "report_content": "ISA~00~          ~00~          ~ZZ~CHC            ~ZZ~658675C9801437 ~200422~2313~|~00501~156233287~0~P~^_GS~HP~CHC~658675C9801437~20200422~23135600~1~X~005010X221A1_ST~835~000000001_BPR~I~2563.13~C~ACH~CCP~01~042000013~DA~152302017834~1351840597~~01~071921891~DA~4638544662~20200423_TRN~1~895322770~1351840597_REF~EV~99992_DTM~405~20200422_N1~PR~NATIONAL GOVERNMENT SERVICES, INC._N3~PO BOX 6475_N4~INDIANAPOLIS~IN~462066475_REF~2U~06102_PER~CX~NATIONAL GOVERNMENT SERVICES, INC.~TE~8779089499_PER~BL~NATIONAL GOVERNMENT SERVICES, INC.~TE~8772734334~UR~WWW.NGSMEDICARE.COM_N1~PE~ADVANED DENTAL AND IMPLANT C~XX~1578001830_N3~2310 HUNTINGTON DR N_N4~ALGONQUIN~IL~601024420_REF~TJ~270424820_LX~1_CLP~00309~19~9006~2563.13~711.4~MB~0220087697150~11~1_NM1~QC~1~DOE~JANE~~~~MI~7SL5RA7XR19_NM1~82~1~~~~~~XX~1234567893_NM1~TT~2~HUMANA, INC.~~~~~PI~00268_MOA~~~MA01~MA15~MA18_DTM~050~20200327_SVC~HC^21210^79~3600~1455.51~~1~HC^21210^79^51_DTM~472~20200101_CAS~CO~45~1685.95~~253~29.7_CAS~PR~1~57.54~~2~371.3_REF~LU~11_AMT~B6~1914.05_SVC~HC^21026^79^51~1890~217.29~~1_DTM~472~20200101_CAS~CO~45~1335.71~~253~4.43~~59~277.14_CAS~PR~2~55.43_REF~LU~11_AMT~B6~277.15_SVC~HC^21208^79^51~1836~648.83~~1_DTM~472~20200101_CAS~CO~45~180.82~~253~13.24~~59~827.59_CAS~PR~2~165.52_REF~LU~11_AMT~B6~827.59_SVC~HC^30580^79^51~1680~241.5~~1_DTM~472~20200101_CAS~CO~45~1063.93~~253~4.93~~59~308.03_CAS~PR~2~61.61_REF~LU~11_AMT~B6~308.04_SE~47~000000001_GE~1~1_IEA~1~156233287_"
}

This is quite a substantial body of EDI information.

Then, you append the /835 suffix to get the JSON translation of the same Remittance file. It consists of a complete breakdown of payment information for all service identifications, payments, payment adjustments, financial information, and Payer and Payee information:

GET

https://apigw.changehealthcare.com/medicalnetwork/reports/v1/R5000000.XX/835

{
    "detailInfo": [
        {
            "assignedNumber": "1",
            "paymentInfo": [
                {
                    "claimPaymentInfo": {
                        "claimFilingIndicatorCode": "MB",
                        "claimFrequencyCode": "1",
                        "claimPaymentAmount": "2563.13",
                        "claimStatusCode": "19",
                        "facilityTypeCode": "11",
                        "patientControlNumber": "00309",
                        "patientResponsibilityAmount": "711.4",
                        "payerClaimControlNumber": "0220087697150",
                        "totalClaimChargeAmount": "9006"
                    },
                    "claimReceivedDate": {
                        "date": "20200327",
                        "dateTimeQualifier": "050"
                    },
                    "crossoverCarrier": {
                        "entityIdentifierCode": "TT",
                        "entityTypeQualifier": "2",
                        "identificationCode": "00268",
                        "identificationCodeQualifier": "PI",
                        "name": "HUMANA, INC."
                    },
                    "outpatientAdjudication": {
                        "claimPaymentRemarkCode1": "MA01",
                        "claimPaymentRemarkCode2": "MA15",
                        "claimPaymentRemarkCode3": "MA18"
                    },
                    "patientName": {
                        "entityIdentifierCode": "QC",
                        "entityTypeQualifier": "1",
                        "firstName": "JANE",
                        "identificationCode": "7SL5RA7XR19",
                        "identificationCodeQualifier": "MI",
                        "name": "DOE"
                    },
                    "renderingProvider": {
                        "entityIdentifierCode": "82",
                        "entityTypeQualifier": "1",
                        "identificationCode": "1234567893",
                        "identificationCodeQualifier": "XX"

...