{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "489142812",
    "entityType": "User",
    "nonce": "0xf9a7b03ed63baac288510d067a04759103d4994b2f9e37c26e11845eb7925504",
    "signature": "0x13a73997d4da78939256460404b057ec239698c3b8533047667bf010bfb6672b444b066d02efbb6e5e6c4ba6af4ec5f39d3de4bd37f0d644ed6d257ee45706511b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}