{
  "manageEntity": {
    "action": "Save",
    "entityId": "261797030",
    "entityType": "Track",
    "nonce": "0x95cd15dc680e5be85c020b853ef9e603d8d8ebb48c0442284b2887fb56542c3e",
    "signature": "0xa80f52f2f62f71c231543c4015440572d591db4c094fa41f2b34f5386a1f4941301951fdf1b38a87adfbf2ec3dde87c52c0c972e8d9092ba44b365e0dcf29b511c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}