{
  "manageEntity": {
    "action": "Save",
    "entityId": "1260115560",
    "entityType": "Track",
    "nonce": "0x10c390c10664a6b35a6fc1391c5bf49ccbebf89a9a6b5c81c109a6b8b2bd5311",
    "signature": "0xd6d6e91601ff2ec059b067e63343e4064357b1d786653c2f97b03db9a0a313fe11f58f2eb0b07ba3c39a24efe1feb69000ca533356fb6d4ce8631e28a1ac1dd31b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}