{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0x117457049ed58cdfa6fb45b641e4f0ad10d751ced34051c298b6180512b21981",
    "signature": "0x38e3c2f12a7db000a9752490186a0a03767928a3ef0cf6ed386be4d9f2d2823a51d933d8215081b9a5c701a1203f25561e551b2197abf1420011530860aee8091c",
    "signer": "0x3AeD7e119d14B0BA01d38E449739bcdc1F60A66D",
    "userId": "36359702"
  }
}