{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1921",
    "entityType": "User",
    "nonce": "0x41dc2b3d54aacbab7a7c772a6901c23ef72df12f458821db377e2732653874bb",
    "signature": "0x18fcc123875fd0ab346645fc2624675a6d2dd61b86dd97ec7d77e6aee5bc897f495729f0ec9d1bb0a1346adb00b1927dfc3c2088a6dd52805017f9afb1042d851b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}