{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x757ebd23e6ce04107d9d85364f56666e1d9de676962e7cdf159ba015680728bc",
    "signature": "0x9815a8cf0c04dd621260de54b4bb21e4a10b53c3027fc031cde23c3ec2a01e840087e20e8d27ee949b3beac82a9fc83cb84a0a4df645fae10168253459a475ed1b",
    "signer": "0xEF1F6B4216d01760FEf89Cb31b32055eCfaF230a",
    "userId": "423476622"
  }
}