{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668973619",
    "entityType": "User",
    "nonce": "0x2d0411297c6e188e0d5441f5de96994afbef95df8a81f4a25954c5b3e0e11725",
    "signature": "0xc56a3671db14a109ab070c046c7a82bb4fdc4cfcb3f995fc7794c179304b3f3727ff11ab360d39f410bb6ef960c78c166fe2a8e724ba51519c905255a02841181c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}