{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc01d34d2b2f932991ab0d8f639fe535486a0b51932176fc94c3da3fd027c79a8",
    "signature": "0x7d74c910e450385b6084f3012800ec4128bcb89caffec840546a270c317451bb1f6d9b06ad76994a2822ebbc9de69b78e92db6aeed6a266bc47d58ec880dbbad1c",
    "signer": "0xa990C4ff71a3a9F87F511cf5D9f06452Cbc9c9a4",
    "userId": "834242708"
  }
}