{
  "manageEntity": {
    "action": "Save",
    "entityId": "252076",
    "entityType": "Track",
    "nonce": "0x636ba53fff3d2f8268b3f61ffefbb30ed082e562f2c745d10a2a96a218445105",
    "signature": "0xd898498abe89ba1880bc58e2a667642a8ed8dedc2e437e8c5e8139525d255b663d8458664cfc1e9dbcbc44449b3f6d2b484a05e94485b20ad9a40370d6291d4a1c",
    "signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
    "userId": "599751364"
  }
}