I was able to retrieve the JSON from Postman;
{
"d": {
"results": [
{
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/EmpEmployment(personIdExternal='100XXXXX',userId='10XXXXX)",
"type": "SFOData.EmpEmployment"
},
"personIdExternal": "10XXXXX,
"userId": "10XXXXX",
"personNav": {
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PerPerson('10XXXXX')",
"type": "SFOData.PerPerson"
},
"phoneNav": {
"results": [
{
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PerPhone(personIdExternal='10XXXXX',phoneType='9340')",
"type": "SFOData.PerPhone"
},
"phoneNumber": "50000000",
"isPrimary": false,
"countryCodeNav": {
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PicklistOption(9162L)",
"type": "SFOData.PicklistOption"
},
"externalCode": "+47"
},
"phoneTypeNav": {
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PicklistOption(9340L)",
"type": "SFOData.PicklistOption"
},
"externalCode": "H"
}
},
{
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PerPhone(personIdExternal='10XXXXXX',phoneType='9339')",
"type": "SFOData.PerPhone"
},
"phoneNumber": "20000000",
"isPrimary": true,
"countryCodeNav": {
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PicklistOption(9162L)",
"type": "SFOData.PicklistOption"
},
"externalCode": "+47"
},
"phoneTypeNav": {
"__metadata": {
"uri": "https://api55preview.sapsf.eu/odata/v2/PicklistOption(9339L)",
"type": "SFOData.PicklistOption"
},
"externalCode": "B"
}
}
]
}
}
}
]
}
}