{
  "manageEntity": {
    "action": "Save",
    "entityId": "810548095",
    "entityType": "Track",
    "nonce": "0x187f1e378b4ba581d3fda9525b4264b1a718bb94035130557fb2d23d58cfa192",
    "signature": "0x940865afc1931d36e7383d1d7795b60972a37885f71d3af65056d4811eab508669bcd9e6a86d1042dd5276c18f282fe7fb4bfffada795fecea465ccd594064ee1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}