[API]. Add ability to send array of entities

[vbabenko]

To add any information (universities, certificates etc) we have to send one object even several entities were created on the FE.
Suggestion: need ability to send an array with a list of objects
Example:

[{
"id"0,
"name":"NAU",
"faculty":"ITS",
"degree":"master",
"startDate":"01/01/2005",
"endDate":"01/01/2011"},

{"id"1,
"name":"NAU",
"faculty":"ITE",
"degree":"phd",
"startDate":"01/01/2009",
"endDate":"01/01/2011"
}]