{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708077815",
    "entityType": "User",
    "nonce": "0x663aec399e8e8999b29d3b68c3cf920b4f7b187193f78871c0c50b93909d94d8",
    "signature": "0x4cb75499e83cbb28037631dd47dfb07c34a035c6d186e2174e7ed881658b4abf7ee8e87a80a2141a5da1913d5f25c33a77aac7cdee49ac4ec8423dba8d11ae941b",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}