{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x889910dcf0ffd2a14fafabb1dbe70ddf13a65ef7fcf93b1dab3d7038000b9746",
    "signature": "0x22a51a5e74e638e7a3e2bedcfaf2f6b6b510a99135173934c5c0e26f74c531a8060e5ca14f946fc2af6133c5715ff4f5e474e82e7eca465b3ca01fd67b73c6201c",
    "signer": "0x019Fc3Af93628FBDf041D601CA0f3B1d108735df",
    "userId": "677998924"
  }
}