{
  "manageEntity": {
    "action": "Save",
    "entityId": "393279971",
    "entityType": "Track",
    "nonce": "0x489482f9d8eeb171924cb65a86f63ee0ddce38f0c40a69fe582b9b84d1007fea",
    "signature": "0x01772a1989737bb72752af33a253a07586acfb951168a956c1b5968a79685f114b973c1436d698480bf7b44b31e3eac94d518a70f0b89ae0c7f8150e788b240a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}