{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801677394",
    "entityType": "Track",
    "nonce": "0x86900a205a89dc418fba148ddafde02b17722e169cf1a873eadee79a4661c8c3",
    "signature": "0xed122d382582aabba98fdd8ab38f95d47ca68e1c318595ba81e4cba7698c81a05fae48c2cbc89b38ee329c661c87e9c8d97f335e12c44bcf4303488f88ddb6d91b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}