{
  "manageEntity": {
    "action": "Save",
    "entityId": "1369169234",
    "entityType": "Track",
    "nonce": "0x0735f848b6caaf973fc2f39d152e0889388aa8d80a0d49077fcdddfe7b1f15c1",
    "signature": "0xfc8b48445f30f4d97c77aaab6991fea93f43e84c59f50c5ab2a9573c2d40edf0455276683dd776678abb20766af8ce60ee59bc37b925db3a848bce0725908fbc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}