{
  "manageEntity": {
    "action": "Save",
    "entityId": "1081758927",
    "entityType": "Track",
    "nonce": "0x7f62f7fed7c763d9f1f99e43ad8408cb31fc1c5cdc079503a889dec63e1ac335",
    "signature": "0x7fd0741e3e6c42894038b32ccc1e8ea5b339b2117c5e9949cea3cd77395d1c6c6ab21ff01510910408b9528785f2f976398ec9e52f2c4af4a08f4a9960d715041b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}