Put event object within indexedMetadata from new DDO structure.

[mariacarmina]

Fixes #526 .

Changes proposed in this PR:

• Put event object within indexedMetadata from new DDO structure.

[mariacarmina]

CLI download failed with:

Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (error={"reason":"processing response error","code":"SERVER_ERROR","body":"{\"id\":125,\"jsonrpc\":\"2.0\",\"error\":{\"message\":\"VM Exception while processing transaction: revert Invalid provider fee\",\"stack\":\"RuntimeError: VM Exception while processing transaction: revert Invalid provider fee\\n    at exactimate (/app/dist/node/1.js:2:166011)\",\"code\":-32000,\"name\":\"RuntimeError\",\"data\":{\"hash\":null,\"programCounter\":43,\"result\":\"0x08c379a000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000014496e76616c69642070726f766964657220666565000000000000000000000000\",\"reason\":\"Invalid provider fee\",\"message\":\"revert\"}}}"

Need to check the provider fee setting from ocean-cli.

EDIT: Didn't occur

[paulo-ocean]

lgtm
(PS: we might have some issues regarding fees, on the other branch)