{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512214950",
    "entityType": "User",
    "nonce": "0x73cb27e265b15088066768068520601cf412302c8b23abdbf7f872ad5c29d9aa",
    "signature": "0xf24c28db101efcdb8f0f0887a51b7ec1cb3ddc512a14f2907a09ec301abc2dc00c9e0ed548971a57887ca485239a87ea9df26874486b49aa3c5e9efe9480d9851b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}