{
  "manageEntity": {
    "action": "Save",
    "entityId": "1492106530",
    "entityType": "Track",
    "nonce": "0x4d1c0a78be4cd66e92860d980769f926d0ba1400a5b347871df2a418bd97de67",
    "signature": "0xc3323033b3468b8274e4c26b19c0965a753f6d7e8a1eaa73e7c8586785374060771ff1df53e7a83969a116def8b03ce416d0ee8d9600fd5d844d4e6fad1b3e991b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}