{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x965d4540a90bd38e5180b33df7ac462430e623046da6ae3bf79cd4e6cf7f1f0a",
    "signature": "0x4d84559b0daaeb1fbb97153bc3992bc417b0cb14a58f19fdbd9bee202a02fbbd3e05ccd64e97af0151e95eeed4b45a8a9d62dd96fc1e0b330f09aa1fba8191881b",
    "signer": "0x90A203647e830a6BCa374f0203a7d7edf8227684",
    "userId": "750901803"
  }
}