{
  "manageEntity": {
    "action": "Save",
    "entityId": "1852391277",
    "entityType": "Track",
    "nonce": "0xf254154f3e410dfcd7788ab1fc3c771135200b2043d6553716ea4f344c30fee7",
    "signature": "0x40a84c35d841b8215c77681605b71f4ec848462580ffa7e6dab823a6c716955c66248a79ae5c9dbe9b49ffb808573bd6311f58cebfdc6070542eed00fb41daed1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}