{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421774111",
    "entityType": "User",
    "nonce": "0x4bde0d7b80759c4cbe0fbdaa60442f4f90d03bae528edfa8e7bc2e69896b3fde",
    "signature": "0x1602c4ef080d5db8e0472fe8c0343027009ccbbac4a947497538da744ca42533050c09520dc1ad834a56caa5cbf5d71b4a8ac0ee98fc8b1fd25ba468841e5ff31c",
    "signer": "0xeD4de8C7aEdcca7a62a5E17Fb9DF5ee4991E5b73",
    "userId": "209405413"
  }
}