{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "143331",
    "entityType": "User",
    "nonce": "0x378cb402a2a11aedbd9d09f4daeb83cf78c2979c3ef5e7b108aeccc738bff7e2",
    "signature": "0x9aef05fe7c8b558e45adf94388ba0c759b8147d612f4fd91d8e45185257964be53d170c014cb64300cd0ff34ec2b7f614903fc890d2e89da709a0687f80456021b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}