TokenAllowance

An approved allowance of token transfers for a spender.

Field	Type	Description
TokenId	TokenID	The token that the allowance pertains to
owner	AccountID	The account ID of the hbar owner (ie. the grantor of the allowance)
spender	AccountID	The account ID of the spender of the hbar allowance
amount	int64	The amount of the spender's token allowance