{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15661",
    "entityType": "User",
    "nonce": "0x3f271f51643795199056ca3f94e7410d13015b06e6bc4ec14936e857ebede758",
    "signature": "0x51c99d21cb8e177ad7172a460583e49e488301573a1fccbefa012c6fa31c7a7536df66590a643b4407f3fa0bf23e3d012fa54b5f126e6fbf3aa73d1d5e5589281b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}