{
  "manageEntity": {
    "action": "Save",
    "entityId": "677925186",
    "entityType": "Track",
    "nonce": "0x1ada692d237c6baf8c1ca37f34972012ab8715b9545d04be787a44383a4cc8a9",
    "signature": "0xbcc8e7bbeeeb3738b0ff1bbc35ede1a19f290714f9cec13484b184672f551cec2e1809983f89702cec628ca00637b9702601f5e8ce472e140fa86be3bd2b63bd1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}