{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "673804201",
    "entityType": "User",
    "nonce": "0xc6b9e4f0e5bda8748896027aa1c2491e58b4f5e6963878066a447ebc7712be3d",
    "signature": "0x1408de9ab8d5b96b95df9e3db1713d55ad39bf76260ab3340ccdedb6144b698c6d653b6dd9ac8d7daaf1e2848c7882b54e3ae16c5654166f752e685dc574e3a11c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}