{
  "manageEntity": {
    "action": "Save",
    "entityId": "274113",
    "entityType": "Track",
    "nonce": "0xae37ae0a8beda1ec43666306468bd94661ef8ba1d41c320d2cfe188fa893c4a2",
    "signature": "0xedebf48564411700f56d4591a06957e19e7b16f4b8e2d5b3f3646ce76e924d955c29556ffbeb9e3419a80625be9cd25c0277f9987a4aa213278ac4908ac7f2b21b",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}