{
  "manageEntity": {
    "action": "Create",
    "entityId": "456851097",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"cover_art_sizes\":\"baeaaaiqseb2mphmh4wt52zybmcqqwu27cddwkdn64pkqfftgdg7y7pqzsdozs\",\"duration\":129,\"genre\":\"Hip-Hop/Rap\",\"orig_file_cid\":\"baeaaaiqsebmlgkctfcudxmjfm2ysp32dnta7g55k3haqrr4sbtbtvicqftyrm\",\"orig_filename\":\"Grey.wav\",\"owner_id\":509651367,\"preview_cid\":\"baeaaaiqsednpqxr3rzfqgm4thmwyzi4bdttbveq6k4z4u47rsvhcwivf5rya2\",\"title\":\"Grey  | FREE BEAT | No Copyright Music | FREE DLL\",\"track_cid\":\"baeaaaiqseaqoql24rhonxghfu74zva2ao7jqufrdchylre5mjcvwljftvzauw\"}}",
    "nonce": "1787421285601295609",
    "signature": "0x38f458ac79d060de66c276f071b5a8fe2b9715140fb94c815ad62bff6103e06e68a3a7fafc839a1e805be6ecee3eaea7ff7f08868c848111d59c9f93399607371c",
    "signer": "0x8CB448A729Eca339BC72280C850c5479f5Cb0AB5",
    "userId": "509651367"
  }
}