{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3746",
    "entityType": "User",
    "nonce": "0x379b2f1b00c3d06b66787007400f40db59315b3c0ad80f42ad354fcc57f582fc",
    "signature": "0x73b6f7846ec89c1df76c85ff87f52ff30fb9b6ad2d29ace2d94bf71cf848671f00b32bd6a369c86ef4dfb0605bdb3cbbae8d3fb0b45598159a69dca2362b3ff61c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}