{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "37409",
    "entityType": "User",
    "nonce": "0x3d1d46b8b8dacf7dacf21b807023205649b1d2c1eed91a745a8633ff223662de",
    "signature": "0xb528c84cf4ec6effad59a0f53dd38315fc9ca9b4febd1e36112d79470f75d82b2fe1c2428644fd2f39200e8e33177471636f77fd1eff9fa95ba805c8ecd21a821b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}