{
  "manageEntity": {
    "action": "Save",
    "entityId": "1945154980",
    "entityType": "Track",
    "nonce": "0x4d2cf980dc31e444fae7a5aeabf6f422d5a3dbee80caa8f28cf654c1979ae652",
    "signature": "0xf1e5646bab7acef267e10001ae26e8289342df80a9f88db333fa2ea6f711e7f10df34ef25e9bb3aefe2ea2393c21de7869d51a4fcab661ce0d6fd7b315cc729e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}