{
  "manageEntity": {
    "action": "Save",
    "entityId": "1027513679",
    "entityType": "Track",
    "nonce": "0x2918cb5c70639b0ddabb832d66654fc935663255098e8cc2ad4fc4c205f1ac6f",
    "signature": "0x658c278cb2b601c8fd7b4d0e8ef1503e1eb00cc305e0959ff75bc9bcc1065589019f511a192cce12eb0356fcb348e9673dde7b3419ba3a39fa122c605d13fd4d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}