{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458155900",
    "entityType": "Track",
    "nonce": "0x1e850a02041ce1b14709c260f7bc083bd0f5b0af3abbf1e1a62b6c8240ad28b0",
    "signature": "0xf191fdd795205d928d4d96aab6fc04378763bb7bdea0517af01427df3f7a0a4d4548bce9c64f64e58648dd055bf8afe1a466f757947d002f18ed46e6c76d3b6c1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}