{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "600177076",
    "entityType": "User",
    "nonce": "0xee209bfeaec88cfc070b13e3c5283248367aa7496f99da33bb683ff80aed73ed",
    "signature": "0xf650391bbf8b1b4a3d85afb7a4494e60c4a270786f9e0187851994f2f4109dd00319244952e3a0bf7485b7132e7a9051f5be26673b533eb8106ec57a25366cd81c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}