{
  "manageEntity": {
    "action": "Save",
    "entityId": "1790948232",
    "entityType": "Track",
    "nonce": "0x3c43f917278a52d5ce83d8ce41c3ccdc6b4a3c8a687017b15d4583121430656a",
    "signature": "0xbbe6ff72edbe8876c80ca77d3348a53abff09e85d6f7c221fd09df20815462260d3c1d992d70a1830f20be06a96948b1c2ce03b48b9f226e8a79c2a17590e2ed1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}