{
  "manageEntity": {
    "action": "Save",
    "entityId": "1811307331",
    "entityType": "Track",
    "nonce": "0xfa3a940480264faed8d2b1ec99a1080dde3770c33bc3fce67fea93d1af54493a",
    "signature": "0xcc4ffd93c3ec7c4a65629a6cfeea3392c9938e4421c781baa0bcf57481756fa0204c51b5f035bcb5e6c347577bb985dd92b129ff49eabe2c1144d0e00ff816111c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}