{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894255961",
    "entityType": "Track",
    "nonce": "0xef4e52b15178c2cea20b68ab66a006d5f1835d14a85ef2222722aa8da3e5fa57",
    "signature": "0x5c543d5148b6f89e4496f04af50aae3c8e7a85d015ff295b0f2ecde16ce466135f03ea95764d867e4860dca65b3917b6ac380fc46709aefb685352480e84b1401b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}