{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x50bf7cc51cf64ead2422d41366c1fdd82c79f016f268342b723ec40ca9346aae",
    "signature": "0x42fee9df4593e9a7c6459c4264730c0b0d48ce608120effc48d859b8d9d21ed510425ea58ee017f1c51d116ffdeda6cf6954afeafbd10af1a94af46a20ffa3a61c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}