nfts721 access --json command is not a valid json

[ialberquilla]

Describe the bug

In order to parse the nfts721 access command --json result as json I'm getting an error because the result is not a valid json. The result is mixing common log and json output

b'Downloading the files\nDownloaded: /tmp/nevermined/swaps/bafybeial46zhj2pf4wnmp7pnmiixxlignw4knjglcj4xbts43vyo7bhmxi\n{"startTime":"2022-10-31T10:26:40.586Z","categoryName":"default","data":[{"status":0,"results":"{\\"destination\\":\\"/tmp/nevermined/swaps/\\"}"}],"level":{"level":9007199254740992,"levelStr":"MARK","colour":"grey"},"context":{},"pid":5597}\n'

To Reproduce

Steps to reproduce the behavior:

1. Download an asset with ncli -n {network} -v nfts721 access {did} --json

Expected behavior

The returned object should be like the following

b{"startTime":"2022-10-31T10:26:40.586Z","categoryName":"default","data":[{"status":0,"results":"{\\"destination\\":\\"/tmp/nevermined/swaps/\\"}"}],"level":{"level":9007199254740992,"levelStr":"MARK","colour":"grey"},"context":{},"pid":5597}\n'

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Additional context

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