{
  "manageEntity": {
    "action": "Save",
    "entityId": "369875",
    "entityType": "Track",
    "nonce": "0x65c1c6e252b91199ba2ef3ce424958d473222fdeff11f630021f7d6dcfb15c32",
    "signature": "0xbd832794db14ff51d949bd833bf819ed3460df0744141ac9b5980c2c4e6d415e62c2c8b2750877053e956372c5df0f7258ff055a66e33c303ec1788dbf683fd41c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}