{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21640",
    "entityType": "User",
    "nonce": "0xe6b3319ce7eae9c50f5af8059fd2d5ccf50d0387da75cb6cdcc544548c2d2862",
    "signature": "0x1d012f73245c438e4d2fe1f530b1aafb1066bf77853667d881b9711d97d664cc5a73d8abe4e69212d22cfc618adce7d6caa6738511be5a2a55d3beb1a4b5b72f1c",
    "signer": "0x4cFd9635b74edd6514FBb781B9C920be24A36AfA",
    "userId": "376830101"
  }
}