{
  "manageEntity": {
    "action": "Save",
    "entityId": "1419038337",
    "entityType": "Track",
    "nonce": "0xca9520f559d6c4c0fdb196fbeb432b96b72ae13af813e05ba1d688ff6de321ac",
    "signature": "0x877ab7ba47d9dbb6c9c2cefb3968338d41750957dd1ba2bf48d7da7139cdeb610e791f1323e8a92095cb85020e406a79695277d3a2eb57ff91bde4fcf4d2aba71b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}