{
  "manageEntity": {
    "action": "Save",
    "entityId": "623701810",
    "entityType": "Track",
    "nonce": "0xad8a09a6e00c815a3ac664ea4b29f2410d3634af8b3e385741be7ff73b870ce8",
    "signature": "0x4abffa627240cfca27a0535a5a81f3c504801e50e8bd4cfbf529f828566394e4274578e2247075bb8ca098af497d3e1713b2e1b07e55b08bbfb73efdc299e0161b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}