PostInitCallback..::..Send Property
List of native Coin amounts to send with the callback message (not optional => use empty array if nothing to send).
Coin is the payment to send with the post-init callback message. Although send is not an optional field of the PostInitCallback, because it is an array,
you can just use [] to not send any payment with the callback message
Namespace:
SecretNET.NFTAssembly: SecretNET.NFT (in SecretNET.NFT.dll)