{
  "manageEntity": {
    "action": "Save",
    "entityId": "411949840",
    "entityType": "Track",
    "nonce": "0xb3e554789e7c586c511da80ab3698ceefeda4b26dae04707239dcaa0b6ad4693",
    "signature": "0xbde01f0e5611aa096f9d25eaccfbd4df1cce7fc3bc100b91207148777815d80305bbaff9438594532bef37302c0f2f235a6e0adb6ccbd5243b38710890230ee71c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}