{
  "manageEntity": {
    "action": "Save",
    "entityId": "1606226480",
    "entityType": "Track",
    "nonce": "0x545a2a37443dec61a55a2affb1a67f6f3f66ada6600a5f3cf004ecff87a22501",
    "signature": "0x2760401e54b6c7f804f37bf5c84ad8216aa25cf12a1f32df8b8531915c4e679f7ee43b39a19118d4a1e1d7b325abd8d2a7e8adea4310a9b630c4b6ee2eee2a711c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}