{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "350658",
    "entityType": "User",
    "nonce": "0x21510ac1d2cd751a622ac515cd1d76286791f652cd6edf654567b83f620c77f7",
    "signature": "0x0030416177d8551d098e2826e83725bdb7143eda45838a5262a6e66e2b8576dc4d81ad5b045b6f8635242fc05f6b47bf327a0041d90333b4a58986a6a46c61a41b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}