{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "124841",
    "entityType": "User",
    "nonce": "0x552e01b31f68c2106bc32ef0c58f40c5e28d74c2f456e1b425e31241e29e9833",
    "signature": "0xddc4def2d39739ef56c1da7b6cc30e3eb6c63e4292e4e4658db37a0d44b0bdf84e1fb149d1d1b83fec32d86e10da1e63e29721e8e342bb60aa17f02311350fe21c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}