{
  "manageEntity": {
    "action": "Save",
    "entityId": "1664876536",
    "entityType": "Track",
    "nonce": "0x49a67bec58cbb6e695c2f626e772495c1f984480c2b30e48de5b09484748386e",
    "signature": "0xad2ce2098eb2d22e58b17b46355562c7a207315a525d4403ce89b95bae15f8ce7b05b40fef9d2117c8fd24cfc2f87bce564b93491a7448b8eeb72b6113f03fe41c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}