{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe60b11645a1ffeabcc73adfc87cb40bf26ecbc245f11ca8abd8fc78aa0ea6350",
    "signature": "0x8584f5f7334a5b1a484180714c14b2b314ff0659bb8ee56cf6ce95d2b7b17fa25e1ac3ff9d2464977370892213ebb5e4e5b6b160fbe98f101e723759caa4d1061b",
    "signer": "0x64CC4E026f6dB17d53032e4D310CDdCD6A47c371",
    "userId": "693381038"
  }
}