{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "420399",
    "entityType": "User",
    "nonce": "0x2f2831f2ca54a44fb099010860d2d7ade2b22e2afcf8450532eb83666be6c712",
    "signature": "0x8e470954210514130c186fae06085e617222450ed5738bedf49689ff668bb0d378b44ac70c98cc8e7a12bdd057429e4b4caa9e569ccd713d1b5270f6d4ad22131c",
    "signer": "0x96818aB6687d2E9bA070EB1d6843ef7BfEF5cDa4",
    "userId": "806873848"
  }
}