{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512061262",
    "entityType": "User",
    "nonce": "0xe21a90da6d48ab51499e256ce2f361ce37fbff1484bc54877f66ca91bc8d0688",
    "signature": "0x147d7c52e0ceff9fe9f3d4c07213bd482411e7d54d9a677b9743d431c7b1df3c00353cf12100d5a88f53fbd8e074bd80e56debf285b9034971a7a97cef99ffd51b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}