{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x616c36066c939348fd49bcf690011239b5ac7295e702c4c91f351f364f3e4137",
    "signature": "0x90188e71cdac1f3744d927e7266978e8ce2542c91bed91f5149d5bb0893d9a9d378627678968e9b2032e88af7941ad9107aaa5b90b75304b41c95ea244e1d1db1c",
    "signer": "0x58Ccb3000AB537CcD6E1c3Fa4AA91773c6c4becf",
    "userId": "907715856"
  }
}