{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "639306401",
    "entityType": "User",
    "nonce": "0x0b1439151c5b0dbb985f54280190c2d895faa6222ad6d2b58b649e719611929d",
    "signature": "0xbb272f70337b867bca4f07f2980e54f6ccc415f716730e0a1d418ee7142bbf5a075ae8c9bd2b9929934d0d52c79fbf008bb029080fe1b6c6adc5c9d840b476231c",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}