{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "619082187",
    "entityType": "User",
    "nonce": "0x2820613b9cb755c88a52115467afdedcc01187689223411e9228ee24e0ca438d",
    "signature": "0x3f100f4cf8454cd87245f4de1b8431d0e2efc9c4c4864c60095452e65eba0f2355c6768109c49f77a88990669f2f5f084fb952fe0d60c087a0b7956e7cd2beb91c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}