{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "604152279",
    "entityType": "User",
    "nonce": "0x73f99a3a9ab6e97e9055c44dfaf37e5ae67edb2b2886a8da4d3006cc1d136be6",
    "signature": "0x66648cff41e608c4d4b6012bae770d409aeb6eef7dd4fb244f8f82316ed301866ac9ea3f7fcdcf5bf5a579f13b0db192a2faaaa8f720a9992e4b6026732c42791c",
    "signer": "0x45C682dAb9Cd8ED5e055aC2F6a860Db5F14c27C9",
    "userId": "611525840"
  }
}