{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1508888",
    "entityType": "User",
    "nonce": "0x4977b2019a1a72d9416e2e1b87c9a3111d5c9a81526c8e3cbfda8bd9384dadb9",
    "signature": "0x9e7b433be15f905456940ce5ac30e73ddc6b026a30ca4dbdbd5df97cf5627bb237a4ab271aae203a2a73e47dd109de297adddeb42e849aecc9458092ec181c9c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}