{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "9457",
    "entityType": "User",
    "nonce": "0x539c5a07adf2f1678d53f4b933a3f748aee519762e3ff2ee47f163aeb7383d19",
    "signature": "0x18e34333e3b991fd4721f508afb64bf042ea167d7f7f9ac110624e2bd58a3e042909ca7af69e44fb512c6922b9d2c85892e6d79bfabeb354387a33713aadd5271c",
    "signer": "0x7212FC9b44b2BB370D62E8b98dA3f7D74c307696",
    "userId": "324170795"
  }
}