{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307953552",
    "entityType": "User",
    "nonce": "0x3a6db4257d241f2aaaa2fd337c3d25b71a1faac740c6b7324f38b109aea81e13",
    "signature": "0x473b2a63c0ed3da1a63ae88e8a5de9e9f149185bf0295db8a5e465651c7995be026a6379a6d0cf17f02fd0ab36d8b7a3935cc49f094a8d697610516a0437b6e41c",
    "signer": "0x3256Bd2D0B1984E7df4FA525017aD9bA48470760",
    "userId": "51"
  }
}