{
  "manageEntity": {
    "action": "Create",
    "entityId": "2057060368",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"title\":\"instr_4.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\":878678075},\"owner_id\":846912,\"track_cid\":\"baeaaaiqsecotrvumrp2aemmeztx4bhdn5ewjhh6yaotp3vruhrxhaikbgwieu\",\"orig_file_cid\":\"baeaaaiqsebmzmkyv5ed5ed2xsgj2tv45dtmtzbqiucydhawz2vmaxmracqslq\",\"orig_filename\":\"instr_4.wav\",\"audio_upload_id\":\"6cf4d7623acc524ffff1a5db3e666222\",\"duration\":180,\"bpm\":121,\"musical_key\":\"E minor\",\"audio_analysis_error_count\":0}}",
    "nonce": "0xb27e3eafdefa3e05bc6a8567a0419be2ae3effc68cfd00f876552a4969c0ad56",
    "signature": "0xd27f41422d859e1b3fd1b1fea4d86f9a1156e663afad8d477b420f0d5c967d0522712ddbc49ead222b7026cf44a3fceab4d437714f8731eb77cb01374c7c34211b",
    "signer": "0x9e14792078c024aD6C58AFF9CEF7bed3B81B8Ce2",
    "userId": "846912"
  }
}