{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745034607",
    "entityType": "Track",
    "nonce": "0x6c0fc0add1b6b4f0726555d22acb7d7a1ad269e48158fccd5235ab20250e33bc",
    "signature": "0x58e79b5c6567879b050a0a9273022527ada97efc0f60537c9c23ea25e8281d67288fce3d1d21af7fe6995698427ca56ede42c9e3cd8d6a55e1fab9fba3ff75921b",
    "signer": "0xB9fD1D12505d407d5Cf71027010F76542d156E70",
    "userId": "980975771"
  }
}