{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x80d6399f2fe74c6be19af6314b79d4754c8422bd68bb0138ca4d4d26a8c165ad",
    "signature": "0xbdca78349b8a7e6c8e45be6e5c73ed085eaebbe45b2eee3e80c1929ce1163c702684b7209deb7521af6200e44ddccd50230a6442025c9bc0aaf0a37b5f7308eb1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}