{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7aa8fffa6384868f34710c2bc3d20f982d572e15cbdb6327a16cb8449d285854",
    "signature": "0x4fe1419c3c10d64b14b3992fa41d2c90c3ce1661da46345f75bf7df640fdffa53e9dfec37cbd3e878a091154b61f39898c5ca382e3f2f2990d99c648fabaa35f1c",
    "signer": "0x9F1ba5048fD5fF69319Fd398E4e181b46451aB6b",
    "userId": "539136535"
  }
}