Facebook ads custom audience Data is missing or does not match schema error - api

Question

i was building a integration with the facebook ads audience API, and according the documentation the request must be created like this:
POST - https://graph.facebook.com/v15.0/<MY_CUSTOM_AUDIENCE_ID>/users?access_token=<MY_ACCESS_TOKEN>
{
"session":{
"session_id":1,
"batch_seq":1,
"last_batch_flag":true,
"estimated_num_total":1
},
"payload":{
"schema":[
"FN"
],
"data":
[
"8b1ebea129cee0d2ca86be6706cd2dfcf79aaaea259fd0c311bdbf2a192be148"
]
}
}
Using the previus example a received a error 400:
{
"error": {
"message": "(#100) Data is missing or does not match schema",
"type": "OAuthException",
"code": 100,
"fbtrace_id": "AqrLd9uIw0D4BBFtHF33bdU"
}
}
For do this i used this documentation https://developers.facebook.com/docs/marketing-api/audiences/guides/custom-audiences#hash
Anyone has use this before?

Answer 1

Your schema field type is array but array use form multi-key qualification.
Change it to string: schema: 'FN'
In docs you can see all formats.
This payload with multi keys work for me:
{
"session": {
"session_id": 123,
"batch_seq": 1,
"last_batch_flag": true
},
"payload": {
"schema": [
"EMAIL",
"PHONE",
"FN"
],
"data": [
["EMAIL_HASH", "PHONE_HASH", "FN_HASH"]
]
}
}