{
  "manageEntity": {
    "action": "Create",
    "entityId": "689731698",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"title\":\"older takes 1.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\":\"LEAD_VOCALS\",\"parent_track_id\":65901046},\"owner_id\":305278851,\"track_cid\":\"baeaaaiqsebbw6bvmtbqywhrztsaqitkg5n2t5p7ytysqvvbdb3mms2pp7isxm\",\"orig_file_cid\":\"baeaaaiqsedmypecxxbbpynlbcn5pnsv4nl4oci6uwffhhamu5ambvd5ipziko\",\"orig_filename\":\"older takes 1.wav\",\"audio_upload_id\":\"215888703a4bd778bf615b98ed9edc19\",\"duration\":201,\"bpm\":110,\"musical_key\":\"D minor\",\"audio_analysis_error_count\":0}}",
    "nonce": "0x9d3eb0e0bed76f6bc98428ba8dd5cade3800ef511fa59a2242a73f088e018496",
    "signature": "0x390bcb2f269f798c4cf64f09383b49310fc184b4f4292df2f173390f1b794b1c45d4190310a23a819085cad3ab353459ee519ff84d32527d34eb325731093e281b",
    "signer": "0xBd296DC17EC1984088B7BA2300F20D0Fc21ea766",
    "userId": "305278851"
  }
}