{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x7507b9e0f84dfa0b3e75a492ce10741b2063fb9269c5c539a74695b6b0c36ff3",
    "signature": "0x7bcdbf30592266b346e8dda1a27dfb4dd50dc5e4c97128c733baa171ee0ad4962796c6506d6c846afec77ec3f9ebf97ed53e80ff47fba09c0ed2ab30a29239581c",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}