{
  "manageEntity": {
    "action": "Save",
    "entityId": "1302721966",
    "entityType": "Track",
    "nonce": "0xb61d39182af8839b36d6351554dff5959ac62174cc6c499f31ccfcd12d6c2e18",
    "signature": "0x869b63ab8606fcb68db00189be1a068627104fdb9a79516cde1096dab108590069d58e5ebe8a0aa9c403c55f31dedda093539a5b1d9f4c42cab95b8df2aef3601b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}