{
  "manageEntity": {
    "action": "Save",
    "entityId": "1819350947",
    "entityType": "Track",
    "nonce": "0x65b6c6924310ca4fa98a4c1bfcba565d2a411fa1a2d84ad7a86ffb689fc8f0e6",
    "signature": "0x7ef999af11616829555fa6adac54c0534b3cbfea731fec73ba2bca68a1a5a73a0ebe7ebae1362ef63cf71bbef38fe38276dcbde6dcea0f42c5bbacb2f834d9501c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}