{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017466892",
    "entityType": "Track",
    "nonce": "0x4aa6842da1690e1ffcf975546c54ba4a0951af300dde2efdfe1dbba4c1e00cf4",
    "signature": "0x9d901a9d69c1e250f2ab3071a3af9df40e539d91ea425ff4f0fb574fd91f2b35256a99403253ab69e677b481b82aa637b689a9d283d7fa9578bbaaa477344bdb1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}