{
  "manageEntity": {
    "action": "Create",
    "entityId": "1572559319",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"access_authorities\":null,\"data\":{\"track_id\":1572559319,\"title\":\"9b38569dea1ea57b09d16ca4b8359f5f\",\"genre\":\"Electronic\",\"is_unlisted\":true,\"is_downloadable\":false,\"is_original_available\":false,\"comments_disabled\":true,\"access_authorities\":null,\"field_visibility\":{\"genre\":false,\"mood\":false,\"tags\":false,\"share\":false,\"play_count\":false,\"remixes\":false},\"owner_id\":715160400,\"track_cid\":\"baeaaaiqsecp2uzkipwnp75pw7dvgl7tz2haviylg4qdy6amcte7iqwsuzgnaa\",\"orig_file_cid\":\"baeaaaiqsedbtoeq5y42iunu6nxbhzdbf3hgmhfzmv6rnespcicr5f47wyeuho\",\"orig_filename\":\"8c997c420677781e00e14aab5911eaa1.wav\",\"audio_upload_id\":\"d9d45f423bbcbcb788b27a625ab741cd\",\"duration\":347,\"cover_art_sizes\":\"baeaaaiqsed4djy2tlkq4j66vzfugvakxxdfn45gfvr43uc4x2xw6whd2iqcjo\"}}",
    "nonce": "0x0bef0d1a2e0ceae4b5255ee633b5bfe8baa06ff3999fab72af8cf1e494aa6675",
    "signature": "0x7ab16074b65164d1962b74160221cc592e32b38f42cbf99a621c279a9c7390c63208f323bfd1586654e404b9e5c4fbfad56d72f420e21529d9db084259dcae661b",
    "signer": "0x98F4295af45c93F3802F70FC0811654a74df1e73",
    "userId": "715160400"
  }
}