{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3870",
    "entityType": "User",
    "nonce": "0x8a5239bab3ac8b5ed85f056dd445f80058eb8ab750ba70fa6794b76cbcd8d087",
    "signature": "0x5f495b03df8aeae79c9e7807a513ad30324a9f21acc131a6dc9f4571ab71607c13ff6b1a66f9d1e2f44e2b3a2060bb61eadf739a92157ff8d615a3965e5eb7a31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}