{
  "manageEntity": {
    "action": "Save",
    "entityId": "1244415038",
    "entityType": "Track",
    "nonce": "0x4d029084af8012f142d7c6567b54f0ee013a2607e72e05ec11cce93a68528e22",
    "signature": "0xa04e40b6b48da2c983d084777ea0b7f8d1bf02588b8852ae8a95542a46ad43ee4a6ff6a2394d1da084045abb8c59e4fee469d04ca246e613253ca4496d13dda41c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}