{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235555850",
    "entityType": "Track",
    "nonce": "0xab6098def4aa9df93bf625ac2664659328763dba643e8eadff1e7c94170699fb",
    "signature": "0x6bafd34f137f4e87ecda233a5726393ccf87887eece252e46f988d1a4ab4d07926844f5b57ec8f15072a4b97c5114067102117174261b0c3e8cd8455879412ae1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}