{
  "manageEntity": {
    "action": "Save",
    "entityId": "31063013",
    "entityType": "Track",
    "nonce": "0x76c3dbd2724384488fb964c06bc68313100272e21594b12c2a2c28f4a88e1748",
    "signature": "0x0c34e265afc6db82ce5857c8efc141a7774ff500b4233d2e85f69de218484a2d323d36c51aee4dc675c0ee735fc661b8d7ded2137daddfb649b536cbd09a23301b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}