{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "754884",
    "entityType": "User",
    "nonce": "0x4ce06a8771a9f0fd7695127d3260517777db57aa97a45226b0f9bb9b73f00046",
    "signature": "0x5d77b404128cfeaec882460fd2d1c2c822f8182431be553b0cde895b6ba676174356f636ed2d879dba5ce670c9506d5e57db5fc42bb9dc541791c31be703adfd1c",
    "signer": "0x4230116F60d3989D218B84425D3D1Dd6C85e1393",
    "userId": "86128800"
  }
}