{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc2d73575374851d9339c86b3580bc055d9a27a912fca000840954c84af08ae45",
    "signature": "0xcd3aa3935a71431e0f9bea3ad3dd5e3cb999af5a3a6a28b2cce378611d7960ab72f944f0d6f8d7ca651105b86991d713e7a93c6ddf7db4b7eadcd266e345a66b1b",
    "signer": "0xaa223Ad6AD72c8f702876eb61AdbaE4F1f36EBA1",
    "userId": "974403669"
  }
}