{
  "manageEntity": {
    "action": "Save",
    "entityId": "1956559447",
    "entityType": "Track",
    "nonce": "0x496131744e15f3dd580eb2a831a03238303c323e0a84c769203b9cf1e452f558",
    "signature": "0xfd933d7e1b2165d79e1d4cc1b2646fcf2e1f789de25ecda10146fdbc54382fd961c655b0b310a3482b54d7b248e41a57262791d2d890f92a46b1b7d3609e84fb1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}