{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0xa7dfaf6b22c511cd9707c0cc86c5c0793c388d80d10272205927821cf14c74a3",
    "signature": "0xf760bce68d96809e2f69ff8e69b16c94bdb3b814b8e8141207f699626d66174f42cd3e1ce15307bc3e8a3e741bb34eee9dfdeb5e4176ec3c74811f7279c8958d1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}