{
  "manageEntity": {
    "action": "Save",
    "entityId": "2108306102",
    "entityType": "Track",
    "nonce": "0xe401ff8c27f5c9f5d3dd766f4ee1a709e06bafd20ec8f3c643f5cb52856ff897",
    "signature": "0xf57fe4f1444c10cb6d00a7dbca1fd207ab5904a72c4e2371059505f25ba6764b7976fb3f1e2619ed0f43b1de8a10150d4c7bdbe545fbd43d45450058178986001b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}