{
  "manageEntity": {
    "action": "Save",
    "entityId": "419356428",
    "entityType": "Track",
    "nonce": "0x184e4ec2254b9c81681d62ff6826b1dfdbbd7c15d58bca5f95eeec3e98e04542",
    "signature": "0x691dde97665e90fc2453eecd51b621fd4a384f5428a9a6b717fbad1bad04eecd3ad9b9805a5a982c6313ef19aece0a7b1ea86066b45d9408c0ebe4df25e7ec871b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}