message_reads field when setting up your webhook.{
"sender":{
"id":"<PSID>"
},
"recipient":{
"id":"<PAGE_ID>"
},
"timestamp":1458668856463,
"read":{
"watermark":1458668856253
}
}
sendersender Field
| Description |
|---|---|
id string | The Page-scoped ID for the person who sent a message to your business |
recipientrecipient Field
| Description |
|---|---|
id string | The ID for your Facebook Page |
read| Property | Type | Description |
|---|---|---|
watermark | Number | All messages that were sent before or at this timestamp were read |
watermark field is used to determine which messages were read. It represents a timestamp indicating that all messages with a timestamp before watermark were read by the recipient.