{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "555239202",
    "entityType": "User",
    "nonce": "0x73cb177aff78eabbd409ec24356ebb5c0be016c46b35021a1e525b169caaeb88",
    "signature": "0x35a6f58d5f1f94a0498c57e062b08961fba55342e442e48217a936263925cbea33ee3f23be9a1d08a82a7600ea721248b33d49df6415f4838e8ff1f095ff9d511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}