{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "TransferActivity",
  "type": "object",
  "properties": {
    "@type": {
      "type": "string",
      "enum": [
        "TRANSFER"
      ]
    },
    "from": {
      "$ref": "#/components/schemas/UnionAddress"
    },
    "owner": {
      "$ref": "#/components/schemas/UnionAddress"
    },
    "contract": {
      "$ref": "#/components/schemas/ContractAddress"
    },
    "collection": {
      "$ref": "#/components/schemas/CollectionId"
    },
    "tokenId": {
      "$ref": "#/components/schemas/BigInteger"
    },
    "itemId": {
      "$ref": "#/components/schemas/ItemId"
    },
    "value": {
      "$ref": "#/components/schemas/BigInteger"
    },
    "purchase": {
      "type": "boolean"
    },
    "transactionHash": {
      "type": "string"
    },
    "blockchainInfo": {
      "$ref": "#/components/schemas/ActivityBlockchainInfo"
    }
  },
  "required": [
    "@type",
    "from",
    "owner",
    "value",
    "transactionHash"
  ]
}