{
  "manageEntity": {
    "action": "Save",
    "entityId": "794228575",
    "entityType": "Track",
    "nonce": "0x1abc7f823a2bfdb502f981eb6433141586d203ae7980282011f93a642f990795",
    "signature": "0xaf69026fa6ba7df0be340ea8ad25278f0b250e168e935fd423549b7c775a247c02bea091d99f84560c32db194d4749decdc64279777889159a62a46a466aa4831c",
    "signer": "0xFB1D43C768E2C6359F2e1c154f6C5f9187F343e7",
    "userId": "166447128"
  }
}