{
  "manageEntity": {
    "action": "Save",
    "entityId": "1584608617",
    "entityType": "Track",
    "nonce": "0x0a18f60665caeedd0d768901ff0fe8bdfdb7016b2cdaf1e97c8a73488d91c62a",
    "signature": "0xc03112748adaa8ba377ea288e815f244b6017a3d4938bf7fc4453a43f321770f78782267c317064a2edc6d9ee4d7b6ebbba5c4b6263bba15c12984840bba18c91b",
    "signer": "0x8E12224e4dDc1BdfeC3d5Bf01DB7e4Ec17403ABa",
    "userId": "627040654"
  }
}