{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0xa4fad64e21e736fb463fa1a74b1ba6dbeb16033fd44a3989aa35193aad4b7477",
    "signature": "0xf7c4353af881d4503d973bbc1bf8dde92e5c498fcf02a11b4b3f47a021c73d204ae9f65917932161bc51792899bb519102cacf9266ddc26fa41aae4e7a6b6f381b",
    "signer": "0x670E4517CCB95F2b528b0D6B0E50DC7a0f51f838",
    "userId": "555604608"
  }
}