{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2cba5c285c5ac88e1d9fd911410603b0abf3bfdb0f5b44914debb776bf6d4c11",
    "signature": "0xcb0c88bf3c9b91743dd5ef22c962fa6b99208f4a327550da035214c5c103807c1a154847948c8a98b072b62871b7149a5ec9547363562743510d73ce6dee7d4f1c",
    "signer": "0x41bB6FDED5F9e639AC3559c743A18132C7Cf721C",
    "userId": "512204345"
  }
}