{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x86fcdf75f1684208027f56dea22e8e1e39dd10f40a2547acb1f5ac608b229675",
    "signature": "0x588ac64cc19440173f0d48d1ccbae314a9c603ebccea09b50cb422f8c859eba63bf4c7a42adfbe7c737aecbde4e1bc34cc11efe7574fa6190f645df1e01f7dad1b",
    "signer": "0xFBEa52d3E4eDDB828C76B6a06eF443674bB301f4",
    "userId": "520478850"
  }
}