{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508547804",
    "entityType": "User",
    "nonce": "0x7bc3536a4058cb8e16e00f106d9d3264a1504e3430de3139ec765cf495276c81",
    "signature": "0xdab0f9da2cfb05098c1a68659d80826497e11753f5b3122446e8ea7f4bdbbad50092b319219015c06d09054119199d8a743601a9fa0211966b53437114eaf2961b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}