{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "881446128",
    "entityType": "User",
    "nonce": "0x420f7f6441117a47c1a3e6528bb2a080181a332ee4d5801cb06f9e0947e28abb",
    "signature": "0xd576b54a65beddec4cc6a7a02183988c3b7b9c60a2f4ef58a51d0356e5d1905a6ffe55b154462f299038d1f2cb92e8251624f50c1aec33a9e950e16e606e1bf01c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}