{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21894",
    "entityType": "User",
    "nonce": "0x4aa11f7f7fcaa62fb1007ef7e389582efe6bfdddda8e867ea6a828b718b843fe",
    "signature": "0xeb6cf2e3b6a5b7fe6e49bd83304a2f171a63eeb4443e32cf203220468aaf2cb012c5e8069a9901ebe6e0577927473072ca789254cd6a55d997440e3e2ac9f3f11c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}