{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "740183549",
    "entityType": "User",
    "nonce": "0x522a2024b7c5c3eed9c277465c65185f033fada84f97daaf03b9a6988a99f378",
    "signature": "0xa53cccafa651ca987c97e7616d87d0cd7ae8526a6720f9d166acb7c63c8ca9894ea95971c4579e13b0ff0bad080b6786ebdfe99bc3b2e72d4a32ec837ebb66241c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}