{
  "manageEntity": {
    "action": "Save",
    "entityId": "73922888",
    "entityType": "Track",
    "nonce": "0x743e40e43994c80ec316f9c11027585c3c6aba718ff6da07da4a85a284b2e6f8",
    "signature": "0xc3c271bde786f94b50987866ebc871a7defdf1cf562ee9c3fb285a3abb336f8f5905112e8fcd33122790bd6e46d671983a1ee432c89b0d167bc12f8a9783ea6c1c",
    "signer": "0x7D273271690538cF855E5b3002A0dD8c154bB060",
    "userId": "1"
  }
}