{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x68a1a89c9a37126794b2331d1e76a1135a953dfeac50eab0202978a18eb7462d",
    "signature": "0x19cfa14e87d674f6eeddf58cc5873fd3f1ff990479d1104a2f8e21056b8ce72e0084144bd869f00e54202f909e9a8b5f407dca5c7f578b0c26b6eee7f47ed02f1c",
    "signer": "0xA49Ea05Fb50d75D15fFDC8Fd7e1567FAa66E8b3c",
    "userId": "406866433"
  }
}