{
  "manageEntity": {
    "action": "Save",
    "entityId": "320625155",
    "entityType": "Track",
    "nonce": "0xc1e275d2e8daada67105d2411841e2954a9047e093f0952acce1b584bcd6fe30",
    "signature": "0x4d6ba53e7b0aca547a6b98a5ba07db370e4f00377b36a6355f4efcf85ebebcc40d7674cbc29f1c7b8156e7e8fc66147b7a6692eafe01e02ec1c05caec8369c231b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}