{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050408",
    "entityType": "Track",
    "nonce": "0x5921b65d7b65e58991d407912ae6e5042953d01628462700c340ff2ff1553fbb",
    "signature": "0x4275d962d3b27971dea6ce74f3ec1ec944a87bfcca8fa95a9c844d8861f1d1bb3a7846848c0c1761c37f1eaf9a66e07cc5637e7b3cd1b93f0d85b118041108da1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}