{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x1ef0c85a15c6f45400a67a9390372ae473fd72b808a9e77f1fa82fa94d216ee0",
    "signature": "0xa8887f3d04e42a4d9f3b83229cb46f337fe1ece6c59db12935c2836d5c3d09d47ce035aaf75461a769df7e5d9b1abc03800232633caa94ccebf44e401a549b731c",
    "signer": "0xa603e9487Ed7C3C62E8acb85f8f32acFf5d6349b",
    "userId": "278135553"
  }
}