{
  "manageEntity": {
    "action": "Save",
    "entityId": "963809",
    "entityType": "Track",
    "nonce": "0xcf8421f8c776677c67cc79ee055decbed27f6b8c42ae96e368a74e787522493c",
    "signature": "0x70a8ce873f11addfd79a6db7bd9897f068edfe29adc9550e5406ceaa22ee164815c1d7df1dc1908ac3f0a7236235acb3af9cc6ca8b79a000ef7a76d4eeb4e80e1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}