{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa6809f904c25bf2c78c10360339d858b21ff4bc95ea5d4341ddcf1a812b418e5",
    "signature": "0x45543216b73f00976dd5aeb13c49aa163eb6253e8c57bd973f03dd690b2e01901cd005b32d730395bd45b0d9fc4aa115d3b29a9f76cb8f4cff4d5f3df0eb892f1c",
    "signer": "0x5B01df050c773fa1D1f9A4aA93A9237C8EA2fEEb",
    "userId": "579019814"
  }
}