{
  "manageEntity": {
    "action": "Save",
    "entityId": "1701873442",
    "entityType": "Track",
    "nonce": "1792407510194911796",
    "signature": "0x5b833bedd767b47075133020e964414b48d5e0d0e9a89175a81d7d5df23917b817cf91fcbde646346cf1affa3cd453cbee44d8e628f2a6f2eb0eeaeec964fd4f1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}