{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x356991d1798d86ea15a5a02de5010296a4bece9fc64ea1ec8272a9ea11ccade6",
    "signature": "0x0f90f4a5797426340c57ba27d62d8ceca2f99da969fb1a286ae09f66977448e36697a8d4757e074830c184be5b3944a46ff8b50e0780b3311600ea3ee3b4d5261b",
    "signer": "0x0D809a7E29D33e6873f308be8dBd9d078BE2231B",
    "userId": "576218945"
  }
}