{
  "manageEntity": {
    "action": "Save",
    "entityId": "1109204",
    "entityType": "Track",
    "nonce": "0x2a6902b437b2ec22711b67e3cf84024c8ba596c9faae4a57f2384fc959ed2615",
    "signature": "0xb398b383ba4a72054a3ad1fd619619bf45a086e2e4ca562e95adc2bb1013f66121a89d5e9d322a53c85124e4d0f36ba029984fd6262315b8ceb50cf8c31af4361c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}