Yes, as long as it's wrappered in an object, in fact top level arrays have a weird security issue so ought to be avoided 
https://stackoverflow.com/questions/3503102/what-are-top-level-json-arrays-and-why-are-they-a-security-risk:
{
  "deceaseds": [
    { // Note that it is an array of Deceased objects.
      "ExternalId": 123, // Your ExternalId - Required
      "Prefix": "",
      "FirstName": "",
      "MiddleName": "",
      "LastName": "",
      "Suffix": "",
      "BirthDate": "",
      "Location": { // Note that this is an object, not an array.
        "ExternalId": 2, // Your LocationExternalId - Required if a location is provided (but that is not required necessarily).
        "Level1": "",
        "Level2": "",
        "Level3": "",
        "Level4": "",
        "Level5": ""
      }
    }
  ]
}
________________________________
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> on behalf of Art Tostaine, Jr. <atostaine@xxxxxxxxx>
Sent: 07 January 2020 16:32
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: JSON Questions
A trading partner sent a sample of JSON data that they require. Is it
possible/correct to specify a Key name for JSON_ARRAY?
[{                              // Note that it is an array of Deceased
objects.
    "ExternalId": 123,          // Your ExternalId - Required
    "Prefix": "",
    "FirstName": "",
    "MiddleName": "",
    "LastName": "",
    "Suffix": "",
     "BirthDate": "",
    "Location": {               // Note that this is an object, not an
array.
        "ExternalId": 2,        // Your LocationExternalId - Required if a
location is provided (but that is not required necessarily).
        "Level1": "",
        "Level2": "",
        "Level3": "",
        "Level4": "",
        "Level5": "",
    }
}]
--
Art Tostaine
--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: 
https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.midrange.com%2Fmailman%2Flistinfo%2Fmidrange-l&data=02%7C01%7C%7Cfe8a7d237bd246c0893708d79386dce9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637140079743125964&sdata=X3yv%2BZ9vngHs1RZsHZZywye5zqbn5L7Q95S9zW7kK9M%3D&reserved=0
or email: MIDRANGE-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives
at 
https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Farchive.midrange.com%2Fmidrange-l&data=02%7C01%7C%7Cfe8a7d237bd246c0893708d79386dce9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637140079743125964&sdata=3lsFSjAeb%2BktFwzpajmnFF6UjxEHbrA2BtilR4gCKmk%3D&reserved=0.
Please contact support@xxxxxxxxxxxx for any subscription related questions.
Help support midrange.com by shopping at amazon.com with our affiliate link: 
https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Famazon.midrange.com&data=02%7C01%7C%7Cfe8a7d237bd246c0893708d79386dce9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637140079743125964&sdata=wojs8IdmY%2FR4mub5WSPVQ%2FjeGhAF4yGnvAZ5rjADwkE%3D&reserved=0
As an Amazon Associate we earn from qualifying purchases.