{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16521",
    "entityType": "User",
    "nonce": "0x36e0d977771b31432141f6692df840ef7bff2bfcc3eda714a2b241c94fa9a1e7",
    "signature": "0x13d2b90608fb0675f2190485efeb8f1a2fd9fc8d7658bc1c0dc71dcccfc9133a494e98f6c4c7a934331abeba7988843372250ddc75fa82e524caaa60dbedb5cc1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}