{
  "manageEntity": {
    "action": "Save",
    "entityId": "1805594232",
    "entityType": "Track",
    "nonce": "0x34dbcf2085cb45f92790ade2fc9de58e1944ffb2b432fe13c2ea4f2e52d35544",
    "signature": "0x356b6d3cc7b2e8a6104d0e19a9d8f6a4acb35741684185f684590065cc1cef0d73abe354a3bbc370e82d59db933ad996a2a92e1b04e12704d91941ae5c2b2e341b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}