{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3542882ffbdecb63faf3b864acc7370c9de9a4d6cfd8303fda36b17752775a61",
    "signature": "0xd7c13e961d3b081ed497264e6d22756ed7eeb27ff0d0fe26dd10b5019c8c0110405b46883752a57caa041483008293cd96453039795e92c6e8d131801549f2471c",
    "signer": "0xA73316C6DB8b039Ef37122e2c626DD0Ba22B4fa7",
    "userId": "580289991"
  }
}