{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x6191779498c1885d1e039392b795b2bbd69946be9a1ddaaae865178f076d9d09",
    "signature": "0xf859dfbbff3a25607ea6e2af374d1943bfb85836f2c32dbc84892c38899ee7286dd9fdffbe505f37198495825a19927157417112d63ecce9d2c29f5f6cd11fe31c",
    "signer": "0x854726bE5910ceEe19fBd2D4CE0518966CA41382",
    "userId": "124312"
  }
}