{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3b0bda869a04bcfc21aa944a8c368de79beb66b6378a28ca44f088d61d7a4708",
    "signature": "0x8d6b9211b081a75da1cb7ef11e1aa0454f173d389780663f2a059fadf6a3fcab4878628f4cd207bd6dee771811d2cf93591f281ee9febab2fe0d3efb156d06571c",
    "signer": "0x75B8148F2bF8a56361A3de893081985CeB812562",
    "userId": "654855960"
  }
}