Google Fit API Rest create data source - api

Question

I'm learning how to use Google Fit API and right now I'm trying to do the examples Google offers to explore the OAuth 2.0 Playground.
There's one example to create a data source whose code is:
POST
https://www.googleapis.com/fitness/v1/users/me/dataSources
{
"name": "example-fit-heart-rate",
"dataStreamId":
"raw:com.google.heart_rate.bpm:1234567890:Example Fit:example-fit-hrm-1:123456",
"dataType": {
"field": [{
"name": "bpm",
"format": "floatPoint"
}],
"name": "com.google.heart_rate.bpm"
},
"application": {
"packageName": "com.example.fit.someapp",
"version": "1.0"
},
"device": {
"model": "example-fit-hrm-1",
"version": "1",
"type": "watch",
"uid": "123456",
"manufacturer":"Example Fit"
},
"type": "raw"
}
when I write that code down in the OAuth Playground I have this error message:
{
"error": {
"status": "INVALID_ARGUMENT",
"message": "Expected dataStreamId to be [raw:com.google.heart_rate.bpm:com.example.fit.someapp:Example Fit:example-fit-hrm-1:123456], but was [raw:com.google.heart_rate.bpm:1234567890:Example Fit:example-fit-hrm-1:123456]",
"code": 400,
"errors": [
{
"reason": "invalidArgument",
"message": "Expected dataStreamId to be [raw:com.google.heart_rate.bpm:com.example.fit.someapp:Example Fit:example-fit-hrm-1:123456], but was [raw:com.google.heart_rate.bpm:1234567890:Example Fit:example-fit-hrm-1:123456]",
"domain": "global"
}
]
}
}
I guess is because of the structure of the dataStreamID but I find it strange because I didn't change any code from the Google site. Also I tried to delete the dataStreamID, change the numbers, try this format type:dataType.name:developer project number:device.manufacturer:device.model:device.uid:dataStreamName
but I have no results.
I'm no pretty sure of how does the dataStreamID structure works so if anyone could explain it to me that would be great.
The link of this Google Fit site:
[https://developers.google.com/fit/rest/v1/workout?hl=es-419]
Hope someone can help me.
Thank you!!!