{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "30121",
    "entityType": "User",
    "nonce": "0x3efd0b5d28a16990a2444d65c5c2a678c278a2c1ba3a86149bb117b19338238e",
    "signature": "0xf1e7a478574d4b457320d58d97bc9b365b03cab100b668792e42530fe1066cc51d469120206ed08ec69579077abb1f2d10c23aeac25dec3da5f4424dfce2a96f1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}