{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "537944538",
    "entityType": "User",
    "nonce": "0xad96c8f1e5417bb407d7d5513b9599f79fe301289d7dc71ef9a31d5769623fab",
    "signature": "0xd2fee0cba2a3abfc54fe6edb88170110d9ab0df539c40e2ba68a16c8d3f2f8ba6ffaef414a7ef44f5d6ffefa4119e4696ddc30ad71b0021b03a4ef18abc16f721b",
    "signer": "0x641D58d14cccB895cC85f210F1CD2B998A692F67",
    "userId": "308555958"
  }
}