{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x42e0bb857a11938fa731db95b7bc59740595ea1c1816061d24c50d0fae31663a",
    "signature": "0xbb9c643d308b7d929d239a6afd408df68b24911cfe727aa1b2370730de10d6c825965390b6889aa1e464a3a8bfa1427127ef0aa6410f96a1820f675a3c6ff0a71c",
    "signer": "0x3Bf783b111463927F9b845D1F30c019A0B7967cd",
    "userId": "400600581"
  }
}