{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045654142",
    "entityType": "Track",
    "nonce": "0x5dd3e39c3968c67ded7df161dcda2dcc78e92b38609057aa90493b552c4f0de6",
    "signature": "0xb744e76eeab3bc0ab4e20066fdc34598f7f9947be31d90c255547610e9026f4e0ec992b8301003850f2ddc02b504824298e215f159fb21933f7ae49e8b87a53c1c",
    "signer": "0x7B3AFAc08245Ef9d1CFfF7f7cdDBCAADE68f94E3",
    "userId": "230426"
  }
}