{
  "manageEntity": {
    "action": "Save",
    "entityId": "1526880671",
    "entityType": "Track",
    "nonce": "0x2cc84d3a896946ddd9eaaaec51fe0c3fdd22202af49dda04e589f6d6d1f52591",
    "signature": "0xfa791091e142f806385ef8293337399ddd17d64ceb46a30a866b0d44bcefec1c27dd690783c45ff38e75c313f9c6d8e358c2dce79447a3dbacfcdd77386111e51c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}