{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "624280781",
    "entityType": "User",
    "nonce": "0x037da83da251e203d1a6d77dbf1e7a1a27dc015eb444a628660ef5ab6ffadb97",
    "signature": "0x912eb9bf6b091e19416d5d7dd8567f46571c2622f4ce7b37014e8ff22acb486555227403da9f78b8236a8e6d3ccfa0ab2c993d283ab0db6f1b54a53d233edee01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}