{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x790ab7ffc501beb93746af814b941d57846bbaf73f0e2b406036b6428e77cdfd",
    "signature": "0x548ec7c6bb2188c98d966ba9ff73f67ce297b49ab2bd0e0175d7c823672a44b943b97c0bd68b7721790aab4af075d9ca754a2a5650dff3109d2cafd56e24e50a1b",
    "signer": "0x8544F8deb69F40Bc253040E62b11728B8f765576",
    "userId": "473219211"
  }
}