{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4444030db4dbd705f5989f1a6a63f72b05da1d14481d9a48b35d83401937878a",
    "signature": "0xea7628e553ad9b51412b3cb1712b39c5de73ae9c60a3e4126f235e317e9436dd6bc6e98455686a54449df4b88551bac93471e2b2d4b2faebca6cdf24a80f235b1c",
    "signer": "0xfCD58eB94eD3B298C497ec71D1A40Db8e120d878",
    "userId": "741289480"
  }
}