{
  "manageEntity": {
    "action": "Save",
    "entityId": "1589324933",
    "entityType": "Track",
    "nonce": "0x43f496d60c3cd62d395131db35608e9bb9a5647eacf46da238f967311f880e8b",
    "signature": "0x1617aba1335ac9cab85f495ef649a1649289e6a08f5effc6f7e5147a3affe72352d7eb65b98e16a71ab4957c0c35b261cd489ae99607b28c1d788473d52b17a31c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}