{
  "manageEntity": {
    "action": "Save",
    "entityId": "751184570",
    "entityType": "Track",
    "nonce": "0x688ace0ec890f147dcc17b5e26861a1f266b05cd34cebbc4f5250c63041939a2",
    "signature": "0xac918106b2d023af92aa47c5162a7641b4cabb9d2593559c7e262405568403000fcf3fcee6c0520a9f064a9a8f40ba4ff701453fed70f03ed4c17577a47b82571b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}