{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "678408994",
    "entityType": "User",
    "nonce": "0xf4c02e571b27e66dfb05409d87c9a29988bf4e65e627031d96b8f3a79d7ce675",
    "signature": "0xe65282195cc6fec8c8c80658e277809115833078bac038b6ddeda24c286b4a1e7c98e02b60bcbded19de35915259204beaeca32789d793afb17f60aa053509901b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}