{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646269533",
    "entityType": "Track",
    "nonce": "0xadc9ecc5030140074d84e922b87aee5ae92676c6afa59c66177d9c8ab714247d",
    "signature": "0x7492c2fa9bfee9329db133df013a2068e19492b417883f2b28f4aa0f0059f0aa5141ce1bb19cedbea7349d268debbc20027eba2a5d001a3f82de83c75a84c6b41c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}