{
  "manageEntity": {
    "action": "Save",
    "entityId": "990416199",
    "entityType": "Track",
    "nonce": "0xe4ed2cf456eca9a99ccfdc0d78796d4abf5832c7cd1b32e223a5003f74048e36",
    "signature": "0xd986a16c4a7feba37bee897148b24d309b2d24e28521a555b8e69ab9bb02a02e506936b741d24d5cd4f23acb6e97481bdb1391c5722ffffd89713a4f7327c9d31b",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}