{
  "manageEntity": {
    "action": "Save",
    "entityId": "1956148196",
    "entityType": "Track",
    "nonce": "0xdade60099caac86dbad224d855e10975207eaa3853478a923f12af6ad21e4d1a",
    "signature": "0x192448c128890d20169223287ac9d78a298b12fb0f75c493e5b9c38d9c3acb5967f355078e09b436620258d95a314c6c443cea1e8cde1597834fd75abd58cff61c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}