{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "646495279",
    "entityType": "User",
    "nonce": "0x3334beccdf65515144fc254effc4d3aef6d2b63904fa5004647c8a0363f35611",
    "signature": "0xd714a12de727d68ac274d8486004edf39e931b8d4d63814d5761ef992435560a4c83abb55f0c8a4469689eef67f37e48e6ee601e914ce49211030fbee307b8041c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}