{
  "manageEntity": {
    "action": "Save",
    "entityId": "1458282510",
    "entityType": "Track",
    "nonce": "0x38173a7188842c57686c47bf41cc896b7833101c537fc70bfc34043b3f1c7f22",
    "signature": "0x0a876bf9cc2edf837be5b31affa88ef4fae026d841971c6dd247e141bc5c76ee7a438c4aeae9121a02107eee7193874d9c786144c8a1eb9e5b0d11275bd0db9a1b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}