How to insert sign box in custom pages

Thanks much Allta for your details. Sign text tags is good option. However I tried and the REST API responses error.

Could you asvise on this?

Request:

{
"fileInfos": [{
"transientDocumentId": "3AAABLblqZhBlsX1DV25id6PiJp7Qn1e3xBPUkkzzbB7YfXs7XtAWhcGLP8QSDshty_WF36-_CB8EW_cBTxk6lwIS0kWoaYVVFhd-CQyl1H3ndIUU1CHkh-JnG1oRuPuKSWXishkSfOXvKWVdlaZlm8c2Rl_FTueudQU7dUcQygG8cYOdCEiY6PTnjKLpZONZQcENBEJxB-ZiT2NULan29Sj_tOvz4NMLiMBvv9cND2rYOfDHX8tD0zu8WVZGjaUaVGpdogF4Mm30FC_TveATbS5oe4vzBPLXm0QvJI6SoFlVoebnhldHEOd5ZN-y4qfTxZpJEQdB2sUzVdQ0x_Mm7cqaMOsDBKy2"
}],
"name": "Sign with sign in custom page numbers",
"participantSetsInfo": [{
"memberInfos": [{
"email": "i*********@********.com"
}
],
"order": 1,
"role": "SIGNER1"
},
{
"memberInfos": [{
"email": "ir*@g.com"
}],
"order": 2,
"role": "SIGNER2"
},
{
"memberInfos": [{
"email": "se*****@*****.com"
}],
"order": 3,
"role": "SIGNER3"
},
{
"memberInfos": [{
"email": "iru*******@*****.com"
}],
"order": 4,
"role": "SIGNER4"
}],
"signatureType": "ESIGN",
"state": "IN_PROCESS"
}

Response

{
"code": "MISSING_REQUIRED_PARAM",
"message": "Valid participantSet role is missing. Valid participantSet role is missing. Valid participantSet role is missing. Valid participantSet role is missing."
}