{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "528688046",
    "entityType": "User",
    "nonce": "0x5da00baa50dc40d42cf8c6dc348553c879eb96a49f15554377f4a883c8d757e8",
    "signature": "0x783b9a9e662e875f21d3dd932bca4d447dbccc1ec7f116efd735fdd8f2583dfc734e2d4059e0e19ecbf2f80df849bdf30c18a3899a04d429418b365153b5a3931c",
    "signer": "0x9b6bD4505e2bCfA88acc8680F463a96DAddf1d0d",
    "userId": "213208842"
  }
}