{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273050718",
    "entityType": "User",
    "nonce": "0xb1a0700ab4fdf4ee92598e824c073834026d0b3297aee30c0797ab0ba0e461a4",
    "signature": "0x3d69ffabaf64008c5a984dddd09e3db1eb87161a6ddbecc32808813a21f1c4742d062811a9db1851404031cccc4acde9bfbf1de72870c6d3c4a9c275b65bda521c",
    "signer": "0x90508144365a4b20f9909C3C9b96a5aF240cC9F8",
    "userId": "330534898"
  }
}