{
  "manageEntity": {
    "action": "Save",
    "entityId": "213940314",
    "entityType": "Track",
    "nonce": "0x2923ecdc4ad5062e63586e8a19dca7fa0a96b5d7d8f7bc3147b61b2fce8ad884",
    "signature": "0x40ce1a5b28e9fad3660fc2c279745a4e4abae2eab9b14a7ddb10773ba6d1fbf57a9fbd033fb6a168ddd814f76c0f3db6f7a2d7626adb177f3af4047dc64da3031c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}