Get related MediaItems by ID

{
  "type": "array",
  "items": {
    "type": "object",
    "properties": {
      "callback": {
        "type": "string"
      },
      "meta": {
        "type": "object",
        "properties": {
          "messages": {
            "type": "array",
            "items": {
              "type": "object",
              "properties": {
                "errorCode": {
                  "type": "string"
                },
                "errorDetail": {
                  "type": "string"
                },
                "errorMessage": {
                  "type": "string"
                },
                "userMessage": {
                  "type": "string"
                }
              }
            }
          },
          "pagination": {
            "type": "object",
            "properties": {
              "count": {
                "type": "integer"
              },
              "currentUrl": {
                "type": "string"
              },
              "max": {
                "type": "integer"
              },
              "nextUrl": {
                "type": "string"
              },
              "offset": {
                "type": "integer"
              },
              "pageNum": {
                "type": "integer"
              },
              "previousUrl": {
                "type": "string"
              },
              "sort": {
                "type": "string"
              },
              "total": {
                "type": "integer"
              },
              "totalPages": {
                "type": "integer"
              }
            }
          },
          "status": {
            "type": "integer"
          }
        }
      },
      "results": {
        "type": "array",
        "items": {
          "type": "object",
          "properties": {
            "campaigns": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "contactEmail": {
                    "type": "string"
                  },
                  "description": {
                    "type": "string"
                  },
                  "endDate": {
                    "type": "string",
                    "format": "date"
                  },
                  "id": {
                    "type": "integer",
                    "format": "int64"
                  },
                  "name": {
                    "type": "string"
                  },
                  "source": {
                    "type": "object",
                    "properties": {
                      "acronym": {
                        "type": "string"
                      },
                      "contactEmail": {
                        "type": "string"
                      },
                      "id": {
                        "type": "integer",
                        "format": "int64"
                      },
                      "largeLogoUrl": {
                        "type": "string"
                      },
                      "name": {
                        "type": "string"
                      },
                      "smallLogoUrl": {
                        "type": "string"
                      },
                      "websiteUrl": {
                        "type": "string"
                      }
                    }
                  },
                  "startDate": {
                    "type": "string",
                    "format": "date"
                  }
                }
              }
            },
            "createdBy": {
              "type": "string"
            },
            "customAttributionUrl": {
              "type": "string"
            },
            "customPreviewUrl": {
              "type": "string"
            },
            "customThumbnailUrl": {
              "type": "string"
            },
            "dateContentAuthored": {
              "type": "string",
              "format": "date"
            },
            "dateContentPublished": {
              "type": "string",
              "format": "date"
            },
            "dateContentReviewed": {
              "type": "string",
              "format": "date"
            },
            "dateContentUpdated": {
              "type": "string",
              "format": "date"
            },
            "dateSyndicationCaptured": {
              "type": "string",
              "format": "date"
            },
            "dateSyndicationUpdated": {
              "type": "string",
              "format": "date"
            },
            "dateSyndicationVisible": {
              "type": "string",
              "format": "date"
            },
            "description": {
              "type": "string"
            },
            "extendedAttributes": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "id": {
                    "type": "integer",
                    "format": "int64"
                  },
                  "name": {
                    "type": "string"
                  },
                  "value": {
                    "type": "string"
                  }
                }
              }
            },
            "externalGuid": {
              "type": "string"
            },
            "foreignSyndicationAPIUrl": {
              "type": "string"
            },
            "hash": {
              "type": "string"
            },
            "id": {
              "type": "integer",
              "format": "int64"
            },
            "language": {
              "type": "object",
              "properties": {
                "id": {
                  "type": "integer",
                  "format": "int64"
                },
                "isActive": {
                  "type": "boolean"
                },
                "isoCode": {
                  "type": "string"
                },
                "name": {
                  "type": "string"
                }
              }
            },
            "mediaType": {
              "type": "string"
            },
            "name": {
              "type": "string"
            },
            "source": {
              "type": "object",
              "properties": {
                "acronym": {
                  "type": "string"
                },
                "contactEmail": {
                  "type": "string"
                },
                "id": {
                  "type": "integer",
                  "format": "int64"
                },
                "largeLogoUrl": {
                  "type": "string"
                },
                "name": {
                  "type": "string"
                },
                "smallLogoUrl": {
                  "type": "string"
                },
                "websiteUrl": {
                  "type": "string"
                }
              }
            },
            "sourceUrl": {
              "type": "string"
            },
            "targetUrl": {
              "type": "string"
            }
          }
        }
      }
    }
  }
}