If you have, or deploy, the package webservices_rest (in XML), you can use:
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curl -v -u administrator:xxx -X PUT -H "Content-Type: application/xml" -d "<probeConfigKeys><configkey><key>profiles/bgbulab57_uimapi_proximus/url</key><value>http://www.proximus.be</value></configkey><configkey><key>profiles/bgbulab57_uimapi_proximus/QoS_bytes_sec</key><value>yes</value></configkey><configkey><key>profiles/bgbulab57_uimapi_proximus/QoS_bytes</key><value>yes</value></configkey><configkey><key>profiles/bgbulab57_uimapi_proximus/QoS_download_time</key><value>yes</value></configkey><configkey><key>profiles/bgbulab57_uimapi_proximus/QoS_redirect_time</key><value>yes</value></configkey><configkey><key>profiles/bgbulab57_uimapi_proximus/QoS_firstbyte_time</key><value>yes</value></configkey><configkey><key>profiles/bgbulab57_uimapi_proximus/QoS_tcpconnect_time</key><value>yes</value></configkey></probeConfigKeys>"
http://bgbulab57/rest/probe/bgbulab57_domain/bgbulab57_hub/bgbulab57/url_response/config -------
Via the UIMAPI (in JSON):
curl -X PUT --header 'Content-Type: application/json' --header 'Accept: application/json' -d '[ { "key":"profiles/bgbulab57_uimapi_google/url","value":"http://www.google.com"},{"key":"profiles/bgbulab57_uimapi_google/QoS_bytes_sec","value":"yes"},{"key":"profiles/bgbulab57_uimapi_google/QoS_bytes","value":"yes"},{"key":"profiles/bgbulab57_uimapi_google/QoS","value":"yes"},{"key":"profiles/bgbulab57_uimapi_google/active","value":"yes"},{"key":"profiles/bgbulab57_uimapi_google/QoS_download_time","value":"yes"},{"key":"profiles/bgbulab57_uimapi_google/QoS_redirect_time","value":"yes"},{ "key":"profiles/bgbulab57_uimapi_google/QoS_firstbyte_time","value":"yes"},{"key":"profiles/bgbulab57_uimapi_google/QoS_tcpconnect_time","value":"yes" }]' 'http://bgbulab57/uimapi/probes/bgbulab57_domain/bgbulab57_hub/bgbulab57/url_response/config'