{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x474a3811227cf08f6483ae907325cf97fa3c1c04fbde3cdd1e85c612dcafff56",
    "signature": "0x0d94a915751e6be0ea5d29c85b248a3dcd78364afa5beb1a3de46e08b1c2e7dd7c927a41784ff94740f4187e2848a4234518b63e9e5ffdbc77d41b974c77f4a51c",
    "signer": "0x89d8eB915223b0368c688C2a51Ee2f5b1CdfC911",
    "userId": "101819865"
  }
}