Freezes transfers of the specified token for the account. Must be signed by the Token’s freezeKey.If the provided account is not found, the transaction will resolve to INVALID_ACCOUNT_ID.If the provided account has been deleted, the transaction will resolve to ACCOUNT_DELETED.If the provided token is not found, the transaction will resolve to INVALID_TOKEN_ID.If the provided token has been deleted, the transaction will resolve to TOKEN_WAS_DELETED.If an Association between the provided token and account is not found, the transaction will resolve to TOKEN_NOT_ASSOCIATED_TO_ACCOUNT.If no Freeze Key is defined, the transaction will resolve to TOKEN_HAS_NO_FREEZE_KEY.Once executed the Account is marked as Frozen and will not be able to receive or send tokens unless unfrozen. The operation is idempotent.