{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "445567",
    "entityType": "User",
    "nonce": "0xcad4ef5e37c0fb782b7d4e62dce7b5cd57ae576ccc05d99f497e82d02c7c6971",
    "signature": "0x48e44656e37feaed94d44386af1c82e0a4b679d8ec5d41d19f4d18aed9d466f148cdadb6d0b61247643cac6c662e119160e575844ad6efcab6d6e920c6292d721b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}