{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787459668",
    "entityType": "Track",
    "nonce": "0x7aeb8497b4c83c1dcfa3880561077a17686c1fc1a48f16e8fbf3d2672b03d515",
    "signature": "0x80203ff8d96f9b9ad4265ebab76f26a0dfac92ca32109adf0dc7b4e2537df4f6749fe7d3e8211986428731be12747ab82c3a8097020ac1e91b99bb5767e97c2e1c",
    "signer": "0xE69EE1e71C27cDfa05141f1DCE82bF0231AD05f1",
    "userId": "933842159"
  }
}