{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "631",
    "entityType": "User",
    "nonce": "0x542eb56b2e099b7c1d9824a7a851053be7dbba199a5ce622703b9c12f739679d",
    "signature": "0xfbb5391adb61afa25deb5379399810331fb6bd361aabf5f08f24c4da2b865c480cbdbaaa11fde1b77ae41f18f064cf7b32667cb1b1b4c0b23477f40004c652a41b",
    "signer": "0xa50fD00015342B99d1B27C62f6F4a1cC0A20D53E",
    "userId": "72975"
  }
}