{
  "manageEntity": {
    "action": "Save",
    "entityId": "1243311039",
    "entityType": "Track",
    "nonce": "0xe6a8a60ed1723922a10450cc7789730da3fba4a807f46cb584f871e1d0a9b5e1",
    "signature": "0x712c1bfdf812c9cab7f70d8e4d416e4e363a356277a9aad0562f47c888b9bc27216cafaaeae82b34a2eb242a335c6c005eb0e69684d903ddfab76f5e13e44eb91c",
    "signer": "0x6101d5B26780C43d80DD72cA183FcFBA9f27A3a4",
    "userId": "172588"
  }
}