{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019109809",
    "entityType": "Track",
    "nonce": "0x621eafe4637d21fc1536118d08c259bccc03b3448a27e09704475d935cbcc5d1",
    "signature": "0x4fd741df8e029176b0f2b1766a4a5eb6e1795414c6251057ffa809313af093b04d88aa2cb8cc2aea1516034642c53964fcf36a7293a735735f6ae62bd9a6fa521b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}