{
  "manageEntity": {
    "action": "Save",
    "entityId": "702221210",
    "entityType": "Track",
    "nonce": "0xa62ae5e28e72c7c2316850c540d8d96ae86499d288de4e9f53e4002576a34523",
    "signature": "0xf6284c0e392d35948d0386561ad7aac642d38a3fb9c1c5a5677a52a3f3704e4f42f3a1ed8e13e42cb321617892efe5a4c6d0bf25da59f52202547ea9adaa8de21c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}