{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa42c39003505e7669b8099b24b5a4664a8c8d68616db1c7581f1fb88f384b149",
    "signature": "0xc14ef0e6d35a337946b19914409a89efebc2d247fe54fbb1e91953ca5320141210a8a8151109652dc90d4d9e85ffa489230c472d8cadb2b48cfccf008a11189f1c",
    "signer": "0x205678e73475844a14D03Ad17675d0dF5C2cD524",
    "userId": "422965736"
  }
}