{
  "manageEntity": {
    "action": "Save",
    "entityId": "299697882",
    "entityType": "Track",
    "nonce": "0xa3fa1f10aa9fc4ac1641849dedab548ad28f55771a7a413ca629b13e332b6e69",
    "signature": "0xf51fec3c1e9cd811841d2458054256ba6a8adcf12d55696de94f743973ea7996580e326ab90c08fa5f17a9ded5957082e7da46aa14bd8cf88fbb91cf982caa6f1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}