{
  "manageEntity": {
    "action": "Create",
    "entityId": "1539464716",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"title\":\"8 Synth.wav\",\"is_stream_gated\":false,\"is_unlisted\":false,\"field_visibility\":{\"genre\":true,\"mood\":true,\"tags\":true,\"share\":true,\"play_count\":true},\"is_downloadable\":true,\"stem_of\":{\"category\":\"OTHER\",\"parent_track_id\":193473653},\"owner_id\":653598798,\"track_cid\":\"baeaaaiqsedaas4clzpkob7ekklfsfe5643zsbjeliimuzlqjx7n6nqo56x5hy\",\"orig_file_cid\":\"baeaaaiqsedroojb7xdwvpwbuai4ggsob2t4kmutx6kxjovlsujwxv75z2whfg\",\"orig_filename\":\"8 Synth.wav\",\"audio_upload_id\":\"5dc8484580be0f0539fa6657c009c94c\",\"duration\":207,\"bpm\":90,\"musical_key\":\"B flat minor\",\"audio_analysis_error_count\":0}}",
    "nonce": "0xd6726a2fc86d4ed717e440de06aef4377a24165569c1b82ef131cb4add623015",
    "signature": "0x9883e8ec7b9ec1f674f07c24e438990c64a59b4fde2b0cc2ddc0bbf9567e1cd076e01a9581dd3b4f7a8b2ee089065a737c11c4ba91ba119f6232aec4f14df03a1c",
    "signer": "0x14A55CAAD52a18f76025A94865ce06ED8A0Ea2cC",
    "userId": "653598798"
  }
}