{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "7248",
    "entityType": "User",
    "nonce": "0xfcd225d1d39a72c6319c3e1f1e59b44cbc8e29d4c30dda04539526bd5c6eb0bb",
    "signature": "0x6b8a35249fb2069493309fda773cf3ca2739890dfd82587d940db3baefb276df3274f84a8ec875bd03ab50cbf99c82a0bc71c81ad865b9630109586dd72aec771b",
    "signer": "0xb8Bf68e2681FA1A8a8ce9c78070BF9644e947378",
    "userId": "12890"
  }
}