Tech Discovery - Cross brand opt-in

(...)
      "communicationPreferences": {
        "L": [
          {
            "M": {
              "id": {
                "S": "loyalty"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "orderStatus"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "marketingEmail"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "email_subscribe"
              },
              "value": {
                "S": "opted_in"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "rewardsEmail"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "Email Opt In"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "marketingPush"
              },
              "value": {
                "S": "true"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "push_subscribe"
              },
              "value": {
                "S": "opted_in"
              }
            }
          },
          {
            "M": {
              "id": {
                "S": "rewardsPush"
              },
              "value": {
                "S": "true"
              }
            }
          }
        ]
      }