{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335443",
    "entityType": "User",
    "nonce": "0x18e5d4e390e29d4b6dd0d12ba4d1882fdca8a806d1ef9b7f7bcd8610608a2982",
    "signature": "0xca2644f729399bda245eff514fbaf8a3a8ab3a53f9b0398040d88b879c109de775c77f41ec5052535be2ee6f40eed9607f89b6ba57d539928fada0a20ac4a10c1b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}