{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678225037",
    "entityType": "Track",
    "nonce": "0x095f07dc7184f95ed4ef0fead567b54e28e7a69ec9567e8f266420ba1d1c4e46",
    "signature": "0xda98db4d30041e67e0ebccf1b6b7ca28b7a9afc589955cc019a103c7e71e6e99332fc39d31798bd87abdf37045c7bd685c0ae11ff534ee1b4bd48a8f70bf72181b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}