{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "137438",
    "entityType": "User",
    "nonce": "0x29e42c7b37ecd2fd0097015ab1fff8083af10f1b79c995e20df6a63d8ff171d7",
    "signature": "0xbeca652678c4b390cba3abbf8ac1460cf6509dd6d452f8c00ae042bbe234b7a70a57c52ed7fe957070e95fdb0ce71c445b14036328e74397bc21af9d1f2f1b3e1c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}