Update ASM characte sets with REST

Hi,

 

i would like to update the ASM policy's character-sets (url or header ...) with REST but i don't know how! When i GET a policy (/mgmt/tm/asm/policies/sUHvoeuXMTm6slcYRzRdNQ), the json object contains this following element :

 

"characterSetReference": {

 

"link": ";, "isSubCollection": true

 

}

 

So i've requested (GET) the character-sets (/mgmt/tm/asm/policies/sUHvoeuXMTm6slcYRzRdNQ/character-sets) and so i received a listing of json objects with characters sets by type (url / header / parameter / ...). Each object have an id and a self link (/mgmt/tm/asm/policies/sUHvoeuXMTm6slcYRzRdNQ/character-sets/yB5yjZ1ML2NvBn-JzBSGLA).

 

"characterSet": [ { "isAllowed": false, "metachar": "0x0" }, { "isAllowed": false, "metachar": "0x1" }, ... ]

 

I've tried to PATCH the self link with modified data but it doesn't work, even though the ASM policy is unactive.

 

Is there a way to update this kind of character set ?

 

Thanks for your help.