{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810374381",
    "entityType": "Track",
    "nonce": "0x474ff240ebd6366cd68bb6cbcb50d92b3fb082a342b42ec89ddf41c42ae01551",
    "signature": "0x66e9915e24b51e15f3f959b0cd7c7cd439099cd72b91c0c53f73817c038d92fc50e0854bf2cf66e3542bc08f1e51d01d5ecced98c44b7fc47ac21372fabeb7791b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}