{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817789288",
    "entityType": "Track",
    "nonce": "0xcd5cccc21fcedd55e95411dba818947d02539b47bc1eaf11208dc3b2d78ce58a",
    "signature": "0x7d1a20529e060bc87eedf17f29a436cfd24e334712432aa2caa6d61b62db2e4d6a9715825650e592d3ef1470f202c819b1f49f05935a3d4253d50937280ec7961c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}