{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670307808",
    "entityType": "User",
    "nonce": "0xd0462ae7d6cc8c55d09dd43099406d776f392239d0eda99f2447761a92205acb",
    "signature": "0xf770795922acbd545519efa0023bf9c2afc24e551f2fffe4e5f26f86242b27ff33a00ef1e83673bfbf46d5be9ed1120d55f2c510f89b9dfa5e8b8a83f2e2eed21b",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}