{
  "manageEntity": {
    "action": "Save",
    "entityId": "857554035",
    "entityType": "Track",
    "nonce": "0xabd054a26824708c7bbf4110b52e1e168f37082a7736c991398f8ab90062e914",
    "signature": "0x22829746a3d3ec2ee8015b9f76c7841328f168f0b5c8cf4c94f4260469450f767cd06b6260071a4ef14906c9123c36da6f725edbac827c228097da45cd1994321b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}