{
  "manageEntity": {
    "action": "Save",
    "entityId": "1260152562",
    "entityType": "Track",
    "nonce": "0xb7593e0c847808ba676d52c8e907197223a0e1a1124591072892cb19e5ab0b53",
    "signature": "0x967df12621b6b23f6283eecdfd0f987713df45367a1ebbf4581f9d01bc1f29c715dec280df3c83104f8c1225414610d50ccd537ec085d1fcaafd3ef64bb6bc2e1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}