restful api get not work，but scan can work

[f cad]

anybody know why restful api scan has data

http://127.0.0.1:8080/ignite?cmd=qryscanexe&pageSize=5&cacheName=contact

result { "successStatus": 0, "error": null, "sessionToken": null,
"response": { "items": [ { "key": { "id": 703896957108224 }, "value": {
"mergedId": null, "priority": 0, "identities": [ { "id": "7", "type":
"idCard", "dateCreated": 1652932875433, "lastUpdated": 1652932875433 } ],
"followerIds": [], "contactType": "LEADER", "dateCreated": 1652932875433,
"lastUpdated": 1652932875433 } } ], "last": true, "queryId": 2,
"fieldsMetadata": [ { "schemaName": null, "typeName": null, "fieldName":
"key", "fieldTypeName": null }, { "schemaName": null, "typeName": null,
"fieldName": "value", "fieldTypeName": null } ] } }.

but get command no result.

http://127.0.0.1:8080/ignite?cacheName=contact&cmd=get&keyType=ContactKey&key={"id":703896957108224}

result { "successStatus": 0, "affinityNodeId":
"ee5e4d0d-5c91-4b9d-b68f-5dfac2f45908", "error": null, "sessionToken":
null, "response": null }