{
  "manageEntity": {
    "action": "Save",
    "entityId": "1577584434",
    "entityType": "Track",
    "nonce": "0xc2938107842ef9bbdc15b3fa2812f1115f4a2e5ca5d6e7a28a054457fb233bbb",
    "signature": "0x6cc628c58a1247dc0213ded415bf138322a9dc338d0ea3693912f9ee73b5c6007d40a4b8fbf0859354542e14efd913c0b4ff6918cc60630dc8a594939997fa441c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}