set a custom multiselect via JIRA REST API - php

Question

I'm trying to set a custom field of type Multiselect via JIRA rest API using php. For reason I'm getting the following error:
{"errorMessages":[],"errors":{"Functionality Impacted":"expected 'value' property to be a string"}}
I have the following code for setting the custom field:
public function requestRemedy($summary, $description, $priority, $goliveDate,$startTime,
$endTime,$clientImpact,$impactedFunctionality,$fundTransfers ,$fieldAffected, $remedyChangeType,
$changeReason,$remedyImpact, $urgency,$riskLevel,$nameRequestor,$emailRequestor)
{
$json = Array ( "fields" => Array (
"project" => Array
( "id" => 10051 ),
"summary" => $summary,
"description" =>$description,
"issuetype" => Array ( "name" => "Remedy Change Management" ),
"priority" => Array("id" => $priority),
"customfield_13774" => $goliveDate,
"customfield_14408" => "$startTime",
"customfield_14409" => "$endTime",
"customfield_14412" => "$clientImpact",
"customfield_14908" =>Array ( 0 => Array(
"value" => ($impactedFunctionality),
)),
"customfield_14414" => Array("id" =>$fundTransfers),
// "customfield_14415" =>Array("id" => $businessOnline,"child" =>Array("id" => $businessDependency) ),
"customfield_14602" => Array("id" =>$fieldAffected),
"customfield_14422" => Array("id" =>$remedyChangeType),
"customfield_14423" => Array("id" =>$changeReason),
"customfield_14424" => Array("id" =>$remedyImpact),
"customfield_14425" => Array("id" =>$urgency),
"customfield_14426" => Array("id" =>$riskLevel),
"customfield_14700"=>$nameRequestor,
"customfield_14702"=>$emailRequestor
)
);
return $json;
}
After adding some dummy data to test the final structure of json, I get the following result:
{
"fields": {
"project": {
"id": 10051
},
"summary": "Test",
"description": "Human DeSC",
"issuetype": {
"name": "Remedy Change Management"
},
"priority": {
"id": "2"
},
"customfield_13774": "2016-11-08",
"customfield_14408": "2016-11-01T07:35:00.000+0200",
"customfield_14409": "2016-11-01T08:35:00.000+0200",
"customfield_14412": "cLIENT iMPACT",
"customfield_14908": [{
"value": ["Savings Accounts", "Current Accounts", "Call Deposits"]
}],
"customfield_14414": {
"id": "13647"
},
"customfield_14602": {
"id": "14022"
},
"customfield_14422": {
"id": "13712"
},
"customfield_14423": {
"id": "13718"
},
"customfield_14424": {
"id": "13722"
},
"customfield_14425": {
"id": "13726"
},
"customfield_14426": {
"id": "13730"
},
"customfield_14700": "Pastor Dan",
"customfield_14702": "email#time.com"
}
}
Which means the issue is here:
"customfield_14908": [{
"value": ["Savings Accounts", "Current Accounts", "Call Deposits"]
}],
the expected structure is:
"customfield_10008": [ {"value": "Savings Accounts" }, {"value": "Current Accounts" }, {"value": "Call Deposits" }]
Now I'm not sure how to build this using an associative array
The custom field I'm trying to set is customfield_14908. What I'm finding weird is that I used similar code for setting a multiselect field on JIRA version 7.2.1 and it works well, but not working on JIRA version 7.0.