{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4222",
    "entityType": "User",
    "nonce": "0x1e7bcf40d35463e22d9b001f4d6dd982bdcadf80d537e4321203c37fec73aa57",
    "signature": "0x559bfe6cf9d67cd48e78c7cd891ba4d99f5ead1aa58b991e5e2c54d029d2f424527ac8228e4938de396fa37c9a687300b006effb7b950fc926400b59bec03f3c1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}