{
  "manageEntity": {
    "action": "Save",
    "entityId": "1541830835",
    "entityType": "Track",
    "nonce": "0xd3361ca912816eccc2ccf8285ed251722b11c04ca483eb1c4aa88db94659e855",
    "signature": "0x2fb63228e58bce02fb1d1b38a0135075cbf2d89a4b9325028afb113c989f7b223e4c32ddfba46777508a9cfec6ff554655654775fedf535b28dc4df99bbfe8eb1c",
    "signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
    "userId": "599751364"
  }
}