{
  "manageEntity": {
    "action": "Save",
    "entityId": "393173036",
    "entityType": "Track",
    "nonce": "0x0480b10518b8315d706c2b4672cc8655c5b4394d3f4a3fb158c029b54c32330d",
    "signature": "0x2b7808a5d21738f507eda2e861b3daab528a660a5133fe78767d38b6cb1747e1005cc071b9b5fdd6224e5ffdcb932c9b26a75b16410d2e56ff76fdb11df43f2f1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}