{
  "manageEntity": {
    "action": "Save",
    "entityId": "273495",
    "entityType": "Track",
    "nonce": "0x07aa9479a0e11c56dae0f668fb4c24c6b5d7293ef964c08aec95c31764faae69",
    "signature": "0xac6d8480012cb0a011da7d4e66e8b973e494bab86bdf62e7e1540e444fc35a6f1464155bf5f62e7934bf4ef1cc9a662ad8e2128efc64b898f4f0229efba3819a1b",
    "signer": "0xf63b89A0Bbc03C7ec59aC257C7082A056082cDB8",
    "userId": "558452493"
  }
}