{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "415170607",
    "entityType": "User",
    "nonce": "0x217fbba4a54d5aa57f70f870eb3afb2809666a3c3fe970e3b9f7dc3ccf09036f",
    "signature": "0xc78346820fb12c9dfc939cecd314c59066c8bc8b48b64f553e760ac6229f445f5c7075a71d0f26608cf066aeb01cff1f31fecfd44d104ef7ef57de5ad606b9e01b",
    "signer": "0x64B0DA55A684D51d3EF114Fe644eac7db132fDb7",
    "userId": "121304325"
  }
}