{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "752389",
    "entityType": "User",
    "nonce": "0x1bc4b6e96dbfe5730344f57067084f126407bfb58b5832e91c2a2181fcf61c19",
    "signature": "0x9228d6340393079acb9700a2ab06bef6045ebb2d40d62a36750df6552d8e8ad027fb947278d554d98a0b4fe56ae91295a991c1f6db8542779edde20e0960becc1b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}