{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "152769",
    "entityType": "User",
    "nonce": "0x66b9e6877eed323308ce8fd8a0b9ee2b2ce45df15e2afafc5430e72d071e140b",
    "signature": "0x553e4da8fd99da3e723c79461a97bdcfb75ba00af4089e9db20413bea8ccf1df21206d2fb9a96917c15b84bd9cb03af04528e34eb3a60b6cf1e58568545ea5ca1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}