{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645526985",
    "entityType": "User",
    "nonce": "0xb3882545e44dfe38dcd51302346cda6646fdbcdf0e59791728d6dba3ce0b355d",
    "signature": "0xa02279a7531458b275de243ef116813b5debe4b39143bcf93d736947a2f7e6e73108b2856589da1dfbb4641db8340124401e5d7d2a4a7768cfb961280f669c091b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}