{
  "manageEntity": {
    "action": "Save",
    "entityId": "763959",
    "entityType": "Track",
    "nonce": "0xea63f73101cdad4957dc0584e0fd81ac882ae0699595d1565fc459b88bc29997",
    "signature": "0x87d2b6f35500946dd371d43c4b67c6f6034940706498a3bda4f801315cc8e2955d280a2d9f41fecaa65d90778e032da4bf8822ee2bb8996491fae941d98194161b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}