{
  "manageEntity": {
    "action": "Create",
    "entityId": "346285998",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"access_authorities\":null,\"data\":{\"track_id\":346285998,\"title\":\"f5bf01656f5bc2c8acd046d6a5e40e6b\",\"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\":\"baeaaaiqseclmxxilnek5y6l7exyr7c5sbttlseyczht77dm2kgaisyuma6s7i\",\"orig_file_cid\":\"baeaaaiqsecjludrjou6xk42b6l2yqcedo7j6zovqpqi25nim6f6bfoacaeyki\",\"orig_filename\":\"6ef1f31afcd00f8c1bce896578017b29.flac\",\"audio_upload_id\":\"055190d3416d888b9b74aff634ed0823\",\"duration\":214,\"cover_art_sizes\":\"baeaaaiqseddcyecamo73nzylesp7kke4wjm6qrhjhmowirnm33bxn6jr5pgxa\"}}",
    "nonce": "0x971b9c8d5e35d12bd7d8e719bcfcdd54a7ea70fc28c97c52b32b47741813e656",
    "signature": "0x307fe8413f4366f0eb37b565a3a8d2be5cff0dfc0e50cc3ae0e045887d0cb7c01231d485111401e6936c0f17580da5737b5abdbac0207b257f8fc6140fc802511c",
    "signer": "0x98F4295af45c93F3802F70FC0811654a74df1e73",
    "userId": "715160400"
  }
}