{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0b87e881dba1bf52519de0ea99008b89f45849f2548c5b4d97c72f3cb2ebd7c0",
    "signature": "0x4dba6d0f2e5b096f6d8efe5fe20db47e375f16f15e4323619198425ed2a3b0a93cfaeac5832f83146aeda16f6aa7832e5e4e4cb251e70012e18ed8348d7872131b",
    "signer": "0x4489275EDE3B5561263a21082691c922E2c3d2f3",
    "userId": "537522818"
  }
}