{
  "manageEntity": {
    "action": "Save",
    "entityId": "1388288905",
    "entityType": "Track",
    "nonce": "0x39cc71768096e83b8ca5d7e274338ca831f85a06772d5fb927e471c5c8c4d02d",
    "signature": "0x968f03d019017400d88dc570a0e692b98c578c8e0486afc8ec218834191e556d0af77c99bc7a9cb91b3bec875a856619effc9af44bd14d37ecb8c97b7d68e5b91b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}