{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "503680101",
    "entityType": "User",
    "nonce": "0x307738c266d47744add42602efa4ae6fe3e942975e12265bcc84f50b42cf3af9",
    "signature": "0x9867c70e82adc03adbb283a7e35377d9308042acde96c50783169903680b84fa2d1ec0add441cf274de6e81be4f65df5e7820f1cb3579c780b934f533d7161c81c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}