{
  "manageEntity": {
    "action": "Save",
    "entityId": "379605882",
    "entityType": "Track",
    "nonce": "0x75bb18970a89c622556d57edec7ce8162356e9c17252f71e484aa62a35d5048f",
    "signature": "0x2c2c9dd83923cb7e8204314eb149c0b1c1388532e4ef22e59539149079a710c95716689446186a113e11f3b07db22697adf572a97942accb583df029248a24331b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}