{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077919464",
    "entityType": "Track",
    "nonce": "0x737d868757fea208fdcbb789f664bde47dbda826c581a24cbb14fa6ce473d5ba",
    "signature": "0x89429bfe788cb97bc55f4f5ea93a30f4cb1537bd4685a4e36cd60f4775a42c4664081a0f2d7397380d62e08e7c8f0ab1b1793de7527553c08ed16596197fd6b81b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}