{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "454340338",
    "entityType": "User",
    "nonce": "0x01bb129ba74a5857e3353451cb17c322b8d5fa4e2d3efef0a5e1066cb749d684",
    "signature": "0xfc4092cdee6c6342dc557049eb0ff746e03759283761b37e49d4f7f3fa19915e7d7bfb3b600109a8b3f53cf61973489bbdf9e9c39120dbe0e30b43fd48b521251b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}