{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6df5ac0fa1be23ddc23a7c7552f0530bdac3e00a7f9e02479edf4a54ab38e690",
    "signature": "0x3f67ae7b5e4d55ee6e23ce237bab1f5a2467a1cbe994e077d08c2cd8e522ef385e3c643df0fdf9cda7651a05a3232ae19af9ac3f4991c245a00bdad88a2465c61c",
    "signer": "0xA9578D29416BBF3138f94226f84df7f6304053f0",
    "userId": "218137599"
  }
}