{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa8b965cc3c9d6ca427b3221f03b074ed582ff41f06dd24428eb11ed32e294764",
    "signature": "0xf5854ba91a2b28dc6e066f304ae68a3e64df708f0b228699ddc6b2fd2db35a2564fc8c9c4392a986428a6cabe20f06254a552bb182047e67e15ff3262e52377c1c",
    "signer": "0x7fdeEB144300AC6b1Be0E83d8f006b2D3140F73D",
    "userId": "325377357"
  }
}