{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "172521",
    "entityType": "User",
    "nonce": "0x58d7b09b12759682020d91b98d83eff93dfbce7dc608bb3d882f3a31bc90cbaf",
    "signature": "0x27bd3c2c9637ae427b2dddc9f6f32a894bb1fc10014d28468a0dc006943c4d9d18ce95f07b239ad2498a7c8560a74554cb19f79525acd10b6927693b2a3f2e7d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}