How to do a same @Multipart POST call by sending an image, String fields and also an Array of objects?

Question

On a call, I register a professional, which involves sending your avatar, which appears in the first line as file and also send other attributes of the professional, for example, the place where he works.

This location is also saved in the database, and has a specific ID, so the object local possesses name and id.

Send strings as @Part it is easy, I had no problems. Send a string of objects local, however, it is challenging.

Can someone help me solve this?

P.S. The code is in Kotlin.

    @Multipart
    @POST("/profissional")
    fun postProfissional(
        @Part file : MultipartBody.Part,
        @Part("name") name: RequestBody,
        @Part("tempoPro") tempoPro: RequestBody,
        @Part("address") address: RequestBody,
        @Part("addressNumb") addressNumb: RequestBody,
        @Part("city") city: RequestBody,
        @Part("state") state: RequestBody,
        @Part("cep") cep: RequestBody,
        @Part("birthDate") birthDate: RequestBody,
        @Part("email") email: RequestBody,
        @Part("pass") pass: RequestBody,
        @Part("phone") phone: RequestBody,
        @Part("Local") saloesQueAtua: ArrayList<Local>?,
        @Part("services") services: ArrayList<RequestBody>?
    ): Call<ResponseBody>

Local Class:

class Local(
    var id : String?,
    var salao : String?
)