{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xde4320c738cabf7ec812b6ce27a539f5510c72e6f82943b959bc711a238227a4",
    "signature": "0x510285d1f40ffc80b74460b4fdfcb06fffda5b9b9e53544cf5a165f0f3f899205bb8bf1b666f3b2d719a439c3db433c17682bdf949aba74a2a4169c89f483c2a1b",
    "signer": "0x57E6e1DC73e16a7d9D0A077241Cf1cA038DE50cF",
    "userId": "309882939"
  }
}