{
  "manageEntity": {
    "action": "Create",
    "entityId": "1434685348",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{\"description\":\"testtt\",\"duration\":144,\"genre\":\"Soundtrack\",\"mood\":\"Cool\",\"orig_file_cid\":\"baeaaaiqsecbchugbjyto53xapt4lw6kbuydeldufvyfqy46byf3rbqy7iip6y\",\"orig_filename\":\"other.mp3\",\"owner_id\":9859,\"preview_cid\":\"baeaaaiqsealb53o5ipjq7l2e7i7yutxufeuf3ij3dsx7tycuahw67hrifbyw4\",\"title\":\"test 3\",\"track_cid\":\"baeaaaiqsecedhtrpbyqsa3b62l4sv44rbxnjoimw2u2rvtotcvccnxyx5hrn6\"}}",
    "nonce": "1777424829442478589",
    "signature": "0x3b397670c7b75a437086bf4c2039fdf0f9ccbe0dd9fee92c04d0adfa391af6a340a6b51ecde9067fd711a62c3b4c4ba0e24cd0329eec45d38f7bfc6a8cf81eca1b",
    "signer": "0x3f0D2D42FA7eece2896546a75f5773D0B8DBF44A",
    "userId": "9859"
  }
}