{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf2f0d7d2a0a3ec97f8e317ee7d53d11473ff3c1e107480e087991a7a0e5e0c82",
    "signature": "0xb8c6db4870bc147c09c637cbc1db5aa58ee68527e307a5733ca382436c90acdc19c2e3095b2bf0f93f2a40de95c62e769e48e8afda25b1956124c4b0162041b31c",
    "signer": "0x0fdbE0966d6f65E3DE225D16D06131c10d4F2b3e",
    "userId": "560630042"
  }
}