{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x09be01c7a7924969ee0e5cf3496d3f4b412c9d4e1c44869a3457183ffb18bf9b",
    "signature": "0xb5b15cd8adffaf372b6d779beb908b98ffad2072d1e1a818a4a9ea42e667caa3066d9712ec507e3d68b331628b7527656331d1c5c94637518a49c8c72373b7d91b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}