{
  "manageEntity": {
    "action": "Save",
    "entityId": "1053518",
    "entityType": "Track",
    "nonce": "0x11afb0b19b37cb030ed942f450d643ad9bd878259a2b9c538894d17d16b9b5f5",
    "signature": "0x7ffe18e10f4e0d6cb08ebbb5e3424d190e76785c8158e874023ae47162c397f216a04161f5b035a36fc5b9b0ae339d5dbd91b78fc1da648b540a7d710c8ddb221b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}