{
  "manageEntity": {
    "action": "Create",
    "entityId": "1977941377",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"access_authorities\":null,\"data\":{\"track_id\":1977941377,\"title\":\"47014979182134a66e54dc71f8e7d860\",\"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\":\"baeaaaiqsealtsmi2wga6q5dkhkdxpxqwue6tlca3dmrysewfieqan2fax4c3q\",\"orig_file_cid\":\"baeaaaiqsecm6zodg2tzolkst6xtlw3ha662dhpcxay5yny2egisdeyilajzjg\",\"orig_filename\":\"49532ff6f7393d126c1508e428f74ec6.flac\",\"audio_upload_id\":\"c758b94d66a2e3a09d5cd9ee10105b65\",\"duration\":127,\"cover_art_sizes\":\"baeaaaiqsedgokp3fswelcdygndqaqxq2fm4h4x6f3vnnekbnya6mvkeuappoi\"}}",
    "nonce": "0x14dc3be37fa1bb9865fecf3723cfa83c89aeeb20ee0e282fede30c329cc589ee",
    "signature": "0xb021e76087b98db3ba7d0ff63677eb7bd81bf94c36691a46e2ba2d831161d5c73031b253146966394682a5677d1be201b250395b5de4117d25c8fd6aec57090c1c",
    "signer": "0x98F4295af45c93F3802F70FC0811654a74df1e73",
    "userId": "715160400"
  }
}