{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54545",
    "entityType": "User",
    "nonce": "0x51ed21f1c7abf41caf7a89206845d5661dd2e7f0ada827cc226bdff8fa455c84",
    "signature": "0x50b481c5b0fad22b406ce29896a9987be45f598cc8f3e0844226d40694ca23ee48bff3a665cfe4f7c6aca3083e3dbb4e268953ab57fd1b72d29d36602195cd6a1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}