{
  "manageEntity": {
    "action": "Save",
    "entityId": "2048458050",
    "entityType": "Track",
    "nonce": "0x3cd5504c6ae697c58f8b89335edb51b9b2ec2c39f8a69ba8744a1a4a336a358c",
    "signature": "0xf96baa4973a8a5ded0b42af7148dac8684bd9b514516d4ddd1091d134b54b36d6895e7b746630b4c289ad90f8f48ec61dcffecc40ccc29bb49a288362d1dfae61b",
    "signer": "0xaBca4973b8911Fb110a95E6e00e5BBFBCa671473",
    "userId": "832058678"
  }
}