{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x99cda921c7bf4bda2965d23b4f456832eb4fb4f258892b5476eb1ac5eba0663d",
    "signature": "0xcc57a3165b6ae2f5fac6a79513f73a316dae4f0a2a99422eed716b094cb402b5476253eb4ecf2b7c4b50fd8952dd3874fca636f16f5f0bf0b5a807aa24f568b91c",
    "signer": "0xC7522B754f9e8637182A11D7639A9C6B62756049",
    "userId": "297841591"
  }
}