{
  "manageEntity": {
    "action": "Save",
    "entityId": "1894728550",
    "entityType": "Track",
    "nonce": "0x892c8c8b47602caace8037588e2a6ed2b2df39dc537a4469ae232bf09844514e",
    "signature": "0x65f5115b0d6775be5a17223c21f584ee39bb6d148e54487b6a2eefffa487aa1e0834afdcbdcc05c05e28f22047cbc1c8b8f361ae4c564f600d00070a171036ea1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}