{
  "manageEntity": {
    "action": "Save",
    "entityId": "1446668501",
    "entityType": "Track",
    "nonce": "0x759afd06a1d870e2458a99cb16db82e8353608028a02df552cc6e0642d7657c5",
    "signature": "0x659780ab1cfcdd1db621b4af0b6680744399a6d409095569e8819c7444a2431b76ad86596f6d25a5578f4ace9dee0ef064795a0494a8a890da52e62e5f29f36f1c",
    "signer": "0x4230116F60d3989D218B84425D3D1Dd6C85e1393",
    "userId": "86128800"
  }
}