{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881031",
    "entityType": "User",
    "nonce": "0xa94133511bd24637c618742851908dd7db5c51203faeddee9570a107fb8aeb4f",
    "signature": "0xb35fdc7f41abf9f957af45fbf216d8f1f1c825dcb6d227656d35d0789c40f4146d868ef9019cf9f6047e367e9a4d6e50fa9fd58983cb94e9a17ad67e6cd9dfd31b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}