{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf1ea5aecbe738f7b2ec4a5f92f5d20b2eeb7b0bdf797083f938ccbdbd20b5223",
    "signature": "0x909d3cc4a5b04bcc6b8b5b2956a5f79cdcd56e96032b4bf72ed8bedfcf33b6c773cf8ddd9cde00425aefe7e205aea32da926baf589e6628452cf550b3b0a8df81c",
    "signer": "0x4219eDC185d97988b2570653ECa05BAeFf091335",
    "userId": "319892282"
  }
}