{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xca7a962438ade5a4db5a6e1f899c69b2fb78ae7579f6a30652b1d6b76b5b7425",
    "signature": "0x9635616937e4014f6ec44fc5ca079e27853428fa3645e0a9fec4d4c3f2e86d6b4b99e57ed574b353e9be01f4ffff04cebc5e6e5d9a1ac6914785ed210f6fcdc01c",
    "signer": "0x8b043BD3b34D973FFb09C785561BA121147C670a",
    "userId": "52254237"
  }
}