{
  "manageEntity": {
    "action": "Save",
    "entityId": "763082498",
    "entityType": "Track",
    "nonce": "0x32d64bd1efcbf9bbf70f87ded54cf1b48a116b7dbfb4ff7b929fb045957f2382",
    "signature": "0x5371e70ad46ff54689e62cbd147c0bebd4f9f2e4ab0ccf5043cf7435937294b36d662629598f98a952de3f4995ba087dae22127329eea808860be4529f9001221b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}