{
  "manageEntity": {
    "action": "Save",
    "entityId": "325406",
    "entityType": "Track",
    "nonce": "0x345a126580daa849fa6c06b8dc87e8710f42836ef736f2bcbf2e0466017fcec9",
    "signature": "0x2246fbb44dd9b71f81e555906b9e14022f5f7495ad9d5098d3064e5f3a35717f34688bb4c07e6843861a51f5f38e300ddd173297ee78c73bd88ef3b4bd2269721c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}