{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "337364291",
    "entityType": "User",
    "nonce": "0x3ab3b849d3c0fa175d45c9831dbd3a5bccc0b0a748c4af1af1bc4d0ab400b843",
    "signature": "0x96e45ed28f48b0b6477c1bed90463ab021233555d99607562de2a235690386ea3afa1a92b66c896b7bfb2126e0c37a1b8d58147e4fa16049f8cc07a3562b43ce1c",
    "signer": "0x45476b43Ea7F36e200122F8cd58A0700b6b12fDF",
    "userId": "302150879"
  }
}