{
  "manageEntity": {
    "action": "Save",
    "entityId": "1386003773",
    "entityType": "Track",
    "nonce": "0x74a7bc4c58db09c154f1d9692e87d00240a1ee7b3ab5a4eb49ddbda6706ae1cf",
    "signature": "0xc75c2f5fc6fd7d8a86c6a2cc070278cfa04433e6f556e2f6237abffe3ff4878b0b145e97003bb07b49dff4d8b47147e92e79ed6b341f9ab1b6140e8e4ba701001b",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}