{
  "manageEntity": {
    "action": "Save",
    "entityId": "1290297512",
    "entityType": "Track",
    "nonce": "0xf65a0f712052300997e8a8680911bed0697a53f2e06bcd3533a84ab317f399f3",
    "signature": "0xca39cf5cd4a07c9c6ef51eadc8b6d1302fa2f271dc58c89f089b8e18ea0d5dd03a6b1dcffd75a4853e4b0b93edde0252709ac183f895d1f39c8b66560a23f7401b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}