{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301606",
    "entityType": "User",
    "nonce": "0x456a8ec582ffee06dfce372205eba22bd54c6a73f004051d09be5c1b8fc328ad",
    "signature": "0xa5105071da258aa0698dc643af913e84d53ec2fceacfda98016fca03e5b3615e421909bff2abefb727e547acdfd3675513cf913b21f6daaea65d00940e2c9a621c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}