{
  "manageEntity": {
    "action": "Save",
    "entityId": "531038",
    "entityType": "Track",
    "nonce": "0x7b5b4a21ab31e31ae2912a8b616df1eee882819dc265e916a36588e6af56ce7b",
    "signature": "0xef95c606e9e284f1cf8c238cbf1a927b09bccbde88b52cef82643d8376acc83f4dc2274ace139a362b5bc8cbc52ba190ca39dc33786844ac390d35581c3e81591b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}