{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121646",
    "entityType": "User",
    "nonce": "0x9f7939163045b3030b7d827655ee0d98456c04d18ab93ce4d5c8a5f1033389c3",
    "signature": "0xdd2b137828cee5e6db92eec652c72dbc2c4cae2111131500bf86a7cc4742d8a049b94d8341121dbb084b93c0895a62a2dddad711b31dc7858dfa5a51c89226631c",
    "signer": "0xaaa210BdF97c681107cE56847557Fe8137107B08",
    "userId": "560013778"
  }
}