{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "193140142",
    "entityType": "User",
    "nonce": "0x8777a7a850049135a648280618fa1374ffbde4035430850cab7c744ad078078b",
    "signature": "0x5f2295c419610b82d4b4a63b788371a60a5a7fd0c4e152459f8faba5c8ffb38c7cc98b6c45acf41c577b85545ea09edfdd91ece306adbd5a66582339053ae9111b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}