{
  "manageEntity": {
    "action": "Save",
    "entityId": "413549391",
    "entityType": "Track",
    "nonce": "0xaeedea9c8b4526152d22e95ebb3a3a2a0de088e67b18073e1ec0bb3196d499d7",
    "signature": "0x3f650e290a50dcaeb87d6f03f0165d22d296fbe2f9f9276effc81830e58997b47401412dcd89c460a67f1f333eb7c6b6d1fd18ce357f0904ec24729fbd5f50711c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}