{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962715608",
    "entityType": "Track",
    "nonce": "0xf98e43c574a58fe9298c9be4eb17264daebcafc3931e6eee9f5c6952dc6e69c7",
    "signature": "0xd3947a43d2445a85cdb41cb385eefbb3c6fa1cf5f0e11179fa36ed312e54ce2e411674687c18d3dc733530192a9441b877387b3548dee319cb86a34eb0b016c01c",
    "signer": "0x020819dBA653525cf3F8069104a51B241BfC46E1",
    "userId": "1967"
  }
}