{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "475275462",
    "entityType": "User",
    "nonce": "0x8bdda576c09bcd853b29ab2d579809544d24672683d727f734f58a1fe9b758f2",
    "signature": "0x243f63378ee7bd32dc4386ee838b6ea064c307a46ceec32a7726b10d5059abf04f7fa54893317ba077b164883b57966b2b68b25398b6f66ff0ce60bcb17221f71c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}