{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2e25e23dc23323a948b3f97b6475ce2fb6e9fe162e11bd7aa62a157472003329",
    "signature": "0xb8e3b44cee43d234263044e15b6cec2d2a12b0b76a25b421400a03b936596a2e1063629a006824f504d3708537f4b6d14b5f9f1bac576abf768723631c30e8e11c",
    "signer": "0xa3861Bde44C7a83411C7CdA6C5b5951356E29C39",
    "userId": "821699550"
  }
}