{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8a7f7268eac0986b2a2bdc004479a9b3081a4754278e5c6cb16a65e705c04894",
    "signature": "0x12e36865b77c0a7a8611e7ad0df4c6fd1a8895f6c3726f3fa039359da90ba2277113a23c0c0d9dfc5cb4f6590abf8fdf81d88631fca60dc706cad82f0c7562401c",
    "signer": "0xa57b4357994d735DB3Db20349Ac21e880472e94D",
    "userId": "521443517"
  }
}