{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "564432",
    "entityType": "User",
    "nonce": "0x810f592985629f6998832358ae57d1b30d157925edf76ef20fafdb0eed3e0e70",
    "signature": "0xd920f5c57626df4c11a5992dd2b75ff09bd15704437335ea408ae5d7413b477a1e0b3f1d0e82e337b96948d8227adee039b9828c7e7a2f620c88b4aafa42c5ef1c",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}