{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf48ba28cd2295e5f7bbb8e0659aa24a67da4d062b54d55a8c07878b1aea361db",
    "signature": "0x83a0d3c37c4c0c1c1a5d2c0ef04cdcf7b8c77691437a858fcd34af9647c5cd7478ce690c2e043708ce8aa02eaa20f5e515a0104958d3e9dc715176ec22a902d81c",
    "signer": "0x312cA3CF75AaD528d8585cf0A1e77C14982AD0c2",
    "userId": "678902152"
  }
}