{
  "manageEntity": {
    "action": "Save",
    "entityId": "592722938",
    "entityType": "Track",
    "nonce": "0xf16a2c732141ba37b4d96f424b795087507c4da0c4e8ef564d6ff4e921accac2",
    "signature": "0xb1d978c0fc7dc9c70e8601eb06bc894c0784b19173b694b0fb848c4eebdfe12715c3c2ffe0be1cfc211c1ca7e63e5d346766d351ba33b1318c52873f564eb2bf1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}