{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247136297",
    "entityType": "Track",
    "nonce": "0x14a1b14218ae31cba685cef8ff42102501b815db7766e7c4201af3918b8b543a",
    "signature": "0xb6ea602502daf0a9ab9f68583096751b35b61c4d7708ef9ba9fbc7a69297e39b08450c579d0277ac259cf9958690bd82c8de765cd00009e491ab3144b0943c8a1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}